diff --git a/drizzle/0009_bouncy_unicorn.sql b/drizzle/0009_bouncy_unicorn.sql
new file mode 100644
index 0000000..afaef46
--- /dev/null
+++ b/drizzle/0009_bouncy_unicorn.sql
@@ -0,0 +1 @@
+ALTER TABLE "tg_groups" ADD CONSTRAINT "tg_groups_link_unique" UNIQUE("link");
\ No newline at end of file
diff --git a/drizzle/meta/0009_snapshot.json b/drizzle/meta/0009_snapshot.json
new file mode 100644
index 0000000..8bb8448
--- /dev/null
+++ b/drizzle/meta/0009_snapshot.json
@@ -0,0 +1,1167 @@
+{
+  "id": "cce502bc-7af1-4529-8192-8c3dc89a5ca8",
+  "prevId": "3c0a4e5d-f278-4fac-a0e1-3efcbe3f43d4",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.auth_accounts": {
+      "name": "auth_accounts",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "account_id": {
+          "name": "account_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "provider_id": {
+          "name": "provider_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "access_token": {
+          "name": "access_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "refresh_token": {
+          "name": "refresh_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "id_token": {
+          "name": "id_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "access_token_expires_at": {
+          "name": "access_token_expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "refresh_token_expires_at": {
+          "name": "refresh_token_expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "scope": {
+          "name": "scope",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "password": {
+          "name": "password",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {
+        "account_userId_idx": {
+          "name": "account_userId_idx",
+          "columns": [
+            {
+              "expression": "user_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {
+        "auth_accounts_user_id_auth_users_id_fk": {
+          "name": "auth_accounts_user_id_auth_users_id_fk",
+          "tableFrom": "auth_accounts",
+          "tableTo": "auth_users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.auth_passkey": {
+      "name": "auth_passkey",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "public_key": {
+          "name": "public_key",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "credential_id": {
+          "name": "credential_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "counter": {
+          "name": "counter",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "device_type": {
+          "name": "device_type",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "backed_up": {
+          "name": "backed_up",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "transports": {
+          "name": "transports",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "aaguid": {
+          "name": "aaguid",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        }
+      },
+      "indexes": {
+        "passkey_userId_idx": {
+          "name": "passkey_userId_idx",
+          "columns": [
+            {
+              "expression": "user_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "passkey_credentialID_idx": {
+          "name": "passkey_credentialID_idx",
+          "columns": [
+            {
+              "expression": "credential_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {
+        "auth_passkey_user_id_auth_users_id_fk": {
+          "name": "auth_passkey_user_id_auth_users_id_fk",
+          "tableFrom": "auth_passkey",
+          "tableTo": "auth_users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.auth_sessions": {
+      "name": "auth_sessions",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "token": {
+          "name": "token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "ip_address": {
+          "name": "ip_address",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_agent": {
+          "name": "user_agent",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {
+        "session_userId_idx": {
+          "name": "session_userId_idx",
+          "columns": [
+            {
+              "expression": "user_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {
+        "auth_sessions_user_id_auth_users_id_fk": {
+          "name": "auth_sessions_user_id_auth_users_id_fk",
+          "tableFrom": "auth_sessions",
+          "tableTo": "auth_users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "auth_sessions_token_unique": {
+          "name": "auth_sessions_token_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "token"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.auth_users": {
+      "name": "auth_users",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "email_verified": {
+          "name": "email_verified",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "image": {
+          "name": "image",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "tg_id": {
+          "name": "tg_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "tg_username": {
+          "name": "tg_username",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "auth_users_email_unique": {
+          "name": "auth_users_email_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "email"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.auth_verifications": {
+      "name": "auth_verifications",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "identifier": {
+          "name": "identifier",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "value": {
+          "name": "value",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {
+        "verification_identifier_idx": {
+          "name": "verification_identifier_idx",
+          "columns": [
+            {
+              "expression": "identifier",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tg_audit_log": {
+      "name": "tg_audit_log",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "integer",
+          "primaryKey": true,
+          "notNull": true,
+          "identity": {
+            "type": "always",
+            "name": "tg_audit_log_id_seq",
+            "schema": "public",
+            "increment": "1",
+            "startWith": "1",
+            "minValue": "1",
+            "maxValue": "2147483647",
+            "cache": "1",
+            "cycle": false
+          }
+        },
+        "admin_id": {
+          "name": "admin_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "target_id": {
+          "name": "target_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "group_id": {
+          "name": "group_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "type": {
+          "name": "type",
+          "type": "varchar(32)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "until": {
+          "name": "until",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "reason": {
+          "name": "reason",
+          "type": "varchar(256)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {
+        "auditlog_adminid_idx": {
+          "name": "auditlog_adminid_idx",
+          "columns": [
+            {
+              "expression": "admin_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tg_grants": {
+      "name": "tg_grants",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "integer",
+          "primaryKey": true,
+          "notNull": true,
+          "identity": {
+            "type": "always",
+            "name": "tg_grants_id_seq",
+            "schema": "public",
+            "increment": "1",
+            "startWith": "1",
+            "minValue": "1",
+            "maxValue": "2147483647",
+            "cache": "1",
+            "cycle": false
+          }
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "granted_by_id": {
+          "name": "granted_by_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "valid_since": {
+          "name": "valid_since",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "valid_until": {
+          "name": "valid_until",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "interrupted_by_id": {
+          "name": "interrupted_by_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "reason": {
+          "name": "reason",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {
+        "tg_grants_user_id_idx": {
+          "name": "tg_grants_user_id_idx",
+          "columns": [
+            {
+              "expression": "user_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {
+        "tg_grants_granted_by_id_tg_permissions_user_id_fk": {
+          "name": "tg_grants_granted_by_id_tg_permissions_user_id_fk",
+          "tableFrom": "tg_grants",
+          "tableTo": "tg_permissions",
+          "columnsFrom": [
+            "granted_by_id"
+          ],
+          "columnsTo": [
+            "user_id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        },
+        "tg_grants_interrupted_by_id_tg_permissions_user_id_fk": {
+          "name": "tg_grants_interrupted_by_id_tg_permissions_user_id_fk",
+          "tableFrom": "tg_grants",
+          "tableTo": "tg_permissions",
+          "columnsFrom": [
+            "interrupted_by_id"
+          ],
+          "columnsTo": [
+            "user_id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tg_groups": {
+      "name": "tg_groups",
+      "schema": "",
+      "columns": {
+        "telegram_id": {
+          "name": "telegram_id",
+          "type": "bigint",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "title": {
+          "name": "title",
+          "type": "varchar",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "tag": {
+          "name": "tag",
+          "type": "varchar",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "link": {
+          "name": "link",
+          "type": "varchar(128)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "tg_groups_link_unique": {
+          "name": "tg_groups_link_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "link"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tg_link": {
+      "name": "tg_link",
+      "schema": "",
+      "columns": {
+        "code": {
+          "name": "code",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "ttl": {
+          "name": "ttl",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "tg_username": {
+          "name": "tg_username",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "tg_id": {
+          "name": "tg_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "tg_link_user_id_auth_users_id_fk": {
+          "name": "tg_link_user_id_auth_users_id_fk",
+          "tableFrom": "tg_link",
+          "tableTo": "auth_users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "tg_link_tg_id_unique": {
+          "name": "tg_link_tg_id_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "tg_id"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tg_messages": {
+      "name": "tg_messages",
+      "schema": "",
+      "columns": {
+        "chat_id": {
+          "name": "chat_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "message_id": {
+          "name": "message_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "author_id": {
+          "name": "author_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "timestamp": {
+          "name": "timestamp",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "message": {
+          "name": "message",
+          "type": "varchar(8704)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "tg_messages_chat_id_message_id_pk": {
+          "name": "tg_messages_chat_id_message_id_pk",
+          "columns": [
+            "chat_id",
+            "message_id"
+          ]
+        }
+      },
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tg_group_admins": {
+      "name": "tg_group_admins",
+      "schema": "",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "group_id": {
+          "name": "group_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "added_by_id": {
+          "name": "added_by_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {
+        "user_id_idx": {
+          "name": "user_id_idx",
+          "columns": [
+            {
+              "expression": "user_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "tg_group_admins_user_id_group_id_pk": {
+          "name": "tg_group_admins_user_id_group_id_pk",
+          "columns": [
+            "user_id",
+            "group_id"
+          ]
+        }
+      },
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tg_permissions": {
+      "name": "tg_permissions",
+      "schema": "",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "bigint",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "roles": {
+          "name": "roles",
+          "type": "text[]",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'{\"admin\"}'"
+        },
+        "added_by_id": {
+          "name": "added_by_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "modified_by_id": {
+          "name": "modified_by_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tg_test": {
+      "name": "tg_test",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "integer",
+          "primaryKey": true,
+          "notNull": true,
+          "identity": {
+            "type": "always",
+            "name": "tg_test_id_seq",
+            "schema": "public",
+            "increment": "1",
+            "startWith": "1",
+            "minValue": "1",
+            "maxValue": "2147483647",
+            "cache": "1",
+            "cycle": false
+          }
+        },
+        "text": {
+          "name": "text",
+          "type": "varchar",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tg_users": {
+      "name": "tg_users",
+      "schema": "",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "bigint",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "first_name": {
+          "name": "first_name",
+          "type": "varchar(192)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "last_name": {
+          "name": "last_name",
+          "type": "varchar(192)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "username": {
+          "name": "username",
+          "type": "varchar(128)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "is_bot": {
+          "name": "is_bot",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "lang_code": {
+          "name": "lang_code",
+          "type": "varchar(35)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp (0) with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.web_test": {
+      "name": "web_test",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "integer",
+          "primaryKey": true,
+          "notNull": true,
+          "identity": {
+            "type": "always",
+            "name": "web_test_id_seq",
+            "schema": "public",
+            "increment": "1",
+            "startWith": "1",
+            "minValue": "1",
+            "maxValue": "2147483647",
+            "cache": "1",
+            "cycle": false
+          }
+        },
+        "text": {
+          "name": "text",
+          "type": "varchar",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {},
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}
\ No newline at end of file
diff --git a/drizzle/meta/_journal.json b/drizzle/meta/_journal.json
index 6cb1be1..7f98fd0 100644
--- a/drizzle/meta/_journal.json
+++ b/drizzle/meta/_journal.json
@@ -64,6 +64,13 @@
       "when": 1775767649095,
       "tag": "0008_tranquil_black_cat",
       "breakpoints": true
+    },
+    {
+      "idx": 9,
+      "version": "7",
+      "when": 1775921413371,
+      "tag": "0009_bouncy_unicorn",
+      "breakpoints": true
     }
   ]
 }
\ No newline at end of file
diff --git a/src/db/schema/tg/groups.ts b/src/db/schema/tg/groups.ts
index ff6f33b..439484b 100644
--- a/src/db/schema/tg/groups.ts
+++ b/src/db/schema/tg/groups.ts
@@ -6,7 +6,7 @@ export const groups = createTable.tg("groups", {
   telegramId: bigint("telegram_id", { mode: "number" }).primaryKey(),
   title: varchar("title").notNull(),
   tag: varchar("tag"),
-  link: varchar("link", { length: 128 }),
+  link: varchar("link", { length: 128 }).unique(),
 
   ...timeColumns,
 })
diff --git a/src/routers/tg/groups.ts b/src/routers/tg/groups.ts
index cc9e95b..8f9fa43 100644
--- a/src/routers/tg/groups.ts
+++ b/src/routers/tg/groups.ts
@@ -1,4 +1,4 @@
-import { eq, ilike, or, sql } from "drizzle-orm"
+import { and, eq, ilike, ne, or, sql } from "drizzle-orm"
 import { z } from "zod"
 import { DB, SCHEMA } from "@/db"
 import { logger } from "@/logger"
@@ -76,6 +76,10 @@ export default createTRPCRouter({
     )
     .output(z.array(z.number()))
     .mutation(async ({ input }) => {
+      for (const group of input) {
+        await DB.delete(GROUPS).where(and(eq(GROUPS.link, group.link), ne(GROUPS.telegramId, group.telegramId)))
+      }
+
       const rows = await DB.insert(GROUPS)
         .values(input)
         .onConflictDoUpdate({