diff --git a/core/components/minishop3/migrations/20251020000000_initial_schema.php b/core/components/minishop3/migrations/20251020000000_initial_schema.php
index 8182bc2c..98c6c42e 100644
--- a/core/components/minishop3/migrations/20251020000000_initial_schema.php
+++ b/core/components/minishop3/migrations/20251020000000_initial_schema.php
@@ -50,14 +50,12 @@ public function up()
         // Get MODX instance
         $modxConfigPath = dirname(__FILE__, 5) . '/config.core.php';
         if (!file_exists($modxConfigPath)) {
-            $this->output->writeln('<error>MODX config.core.php not found</error>');
-            return;
+            throw new \RuntimeException('MODX config.core.php not found');
         }
 
         require_once $modxConfigPath;
         if (!defined('MODX_CORE_PATH')) {
-            $this->output->writeln('<error>MODX_CORE_PATH not defined</error>');
-            return;
+            throw new \RuntimeException('MODX_CORE_PATH not defined');
         }
 
         require_once MODX_CORE_PATH . 'vendor/autoload.php';
@@ -71,6 +69,7 @@ public function up()
         $modx->addPackage('MiniShop3\\Model', $modelPath, null, 'MiniShop3\\');
 
         $manager = $modx->getManager();
+        $failedTables = [];
 
         $this->output->writeln('<info>Creating MiniShop3 tables...</info>');
         $this->output->writeln("<comment>Model path: {$modelPath}</comment>");
@@ -82,6 +81,7 @@ public function up()
             $mysqlClass = 'MiniShop3\\Model\\mysql\\' . $className;
             if (!class_exists($mysqlClass)) {
                 $this->output->writeln("<error>  ✗ Model class not found: {$mysqlClass}</error>");
+                $failedTables[] = $this->resolveLogicalTableName($className) ?? $className;
                 continue;
             }
 
@@ -102,18 +102,32 @@ public function up()
             if ($created) {
                 $this->output->writeln("<info>  ✓ Created table: {$tableName}</info>");
             } else {
+                $logicalTable = $this->resolveLogicalTableName($className) ?? trim($tableName, '`');
                 $this->output->writeln("<error>  ✗ Failed to create table: {$tableName}</error>");
+                $failedTables[] = $logicalTable;
 
-                // Log xPDO errors
-                $errors = $modx->errorHandler->errors;
-                if (!empty($errors)) {
-                    foreach ($errors as $error) {
-                        $this->output->writeln("<error>    " . print_r($error, true) . "</error>");
-                    }
+                foreach ($modx->errorHandler->errors as $error) {
+                    $message = is_array($error) ? ($error['message'] ?? json_encode($error)) : (string) $error;
+                    $this->output->writeln("<error>    {$message}</error>");
                 }
+                continue;
+            }
+
+            $logicalTable = $this->resolveLogicalTableName($className);
+            if ($logicalTable !== null && !$this->hasTable($logicalTable)) {
+                $this->output->writeln(
+                    "<error>  ✗ Failed to create table: {$tableName} (createObjectContainer succeeded but table is missing)</error>"
+                );
+                $failedTables[] = $logicalTable;
             }
         }
 
+        if ($failedTables !== []) {
+            throw new \RuntimeException(
+                'MiniShop3 initial schema failed for tables: ' . implode(', ', $failedTables)
+            );
+        }
+
         $this->output->writeln('<info>MiniShop3 schema creation completed!</info>');
 
         // Add foreign keys after all tables are created
@@ -181,6 +195,19 @@ public function down()
         $this->output->writeln('<info>MiniShop3 schema removal completed!</info>');
     }
 
+    /**
+     * Unprefixed Phinx table name for a model class (e.g. msGridField -> ms3_grid_fields).
+     */
+    protected function resolveLogicalTableName(string $className): ?string
+    {
+        $mysqlClass = 'MiniShop3\\Model\\mysql\\' . $className;
+        if (!class_exists($mysqlClass)) {
+            return null;
+        }
+
+        return $mysqlClass::$metaMap['table'] ?? null;
+    }
+
     /**
      * Convert CamelCase to snake_case
      * Example: msOrderProduct -> order_products
diff --git a/core/components/minishop3/migrations/20260522120000_repair_grid_fields_if_missing.php b/core/components/minishop3/migrations/20260522120000_repair_grid_fields_if_missing.php
new file mode 100644
index 00000000..f8083df3
--- /dev/null
+++ b/core/components/minishop3/migrations/20260522120000_repair_grid_fields_if_missing.php
@@ -0,0 +1,182 @@
+<?php
+
+declare(strict_types=1);
+
+use Phinx\Migration\AbstractMigration;
+
+/**
+ * Self-heal ms3_grid_fields when initial_schema or seed migrations did not populate defaults.
+ *
+ * Covers:
+ * - table missing after a silent/partial initial_schema run (#270)
+ * - empty grid configs after seed migrations no-op'd (double-prefix bug in #271, fixed in #276)
+ *
+ * Only re-seeds grid keys that are empty; patch migrations run only for the affected grid.
+ */
+final class RepairGridFieldsIfMissing extends AbstractMigration
+{
+    /**
+     * grid_key => seed migration + optional follow-up patches for that grid only.
+     *
+     * @var array<string, array{seed: array{class: string, file: string}, patches?: list<array{class: string, file: string}>}>
+     */
+    private const GRID_REPAIR_PLAN = [
+        'customers' => [
+            'seed' => ['class' => 'SeedCustomersGridConfig', 'file' => '20251127000002_seed_customers_grid_config.php'],
+        ],
+        'orders' => [
+            'seed' => ['class' => 'SeedOrdersGridConfig', 'file' => '20251204140000_seed_orders_grid_config.php'],
+            'patches' => [
+                ['class' => 'FixOrdersGridFilterable', 'file' => '20260107120000_fix_orders_grid_filterable.php'],
+                ['class' => 'UpdateOrdersGridStatusFields', 'file' => '20260119220000_update_orders_grid_status_fields.php'],
+            ],
+        ],
+        'order_products' => [
+            'seed' => ['class' => 'SeedOrderProductsGridConfig', 'file' => '20251215120000_seed_order_products_grid_config.php'],
+        ],
+        'deliveries' => [
+            'seed' => ['class' => 'SeedDeliveriesGridConfig', 'file' => '20251222120000_seed_deliveries_grid_config.php'],
+        ],
+        'vendors' => [
+            'seed' => ['class' => 'SeedVendorsGridConfig', 'file' => '20251223130000_seed_vendors_grid_config.php'],
+        ],
+        'category-products' => [
+            'seed' => ['class' => 'SeedCategoryProductsGridConfig', 'file' => '20251231140000_seed_category_products_grid_config.php'],
+            'patches' => [
+                ['class' => 'AddDuplicatePublishToCategoryProductsActions', 'file' => '20260317120000_add_duplicate_publish_to_category_products_actions.php'],
+            ],
+        ],
+    ];
+
+    private string $prefix = '';
+
+    public function up(): void
+    {
+        $this->prefix = (string) ($this->getAdapter()->getOption('table_prefix') ?? '');
+
+        $emptyGridKeys = $this->findEmptyGridKeys();
+        if ($emptyGridKeys === []) {
+            return;
+        }
+
+        if (!$this->hasTable('ms3_grid_fields')) {
+            $this->ensureGridFieldsTable();
+        }
+
+        if (!$this->hasTable('ms3_grid_fields')) {
+            throw new \RuntimeException('ms3_grid_fields is still missing after repair attempt');
+        }
+
+        $this->loadMigrationFilesForGridKeys($emptyGridKeys);
+
+        foreach ($emptyGridKeys as $gridKey) {
+            $plan = self::GRID_REPAIR_PLAN[$gridKey];
+            $this->runChildMigration($plan['seed']['class']);
+
+            foreach ($plan['patches'] ?? [] as $patch) {
+                $this->runChildMigration($patch['class']);
+            }
+        }
+    }
+
+    public function down(): void
+    {
+        // Repair is data correction; rolling back would remove restored defaults.
+    }
+
+    /**
+     * @return list<string>
+     */
+    private function findEmptyGridKeys(): array
+    {
+        if (!$this->hasTable('ms3_grid_fields')) {
+            return array_keys(self::GRID_REPAIR_PLAN);
+        }
+
+        $emptyGridKeys = [];
+        foreach (array_keys(self::GRID_REPAIR_PLAN) as $gridKey) {
+            if ($this->countGridRows($gridKey) === 0) {
+                $emptyGridKeys[] = $gridKey;
+            }
+        }
+
+        return $emptyGridKeys;
+    }
+
+    private function ensureGridFieldsTable(): void
+    {
+        $modx = $this->bootstrapModx();
+        $tableFqn = $modx->getTableName(\MiniShop3\Model\msGridField::class);
+        $created = $modx->getManager()->createObjectContainer(\MiniShop3\Model\msGridField::class);
+        if (!$created || !$this->hasTable('ms3_grid_fields')) {
+            throw new \RuntimeException('Failed to create table ' . trim($tableFqn, '`'));
+        }
+
+        $this->output->writeln('<info>Created missing table ' . trim($tableFqn, '`') . '</info>');
+    }
+
+    private function countGridRows(string $gridKey): int
+    {
+        $quotedGridKey = $this->getAdapter()->getConnection()->quote($gridKey);
+        $row = $this->fetchRow(
+            "SELECT COUNT(*) AS cnt FROM {$this->prefix}ms3_grid_fields WHERE grid_key = {$quotedGridKey}"
+        );
+
+        return (int) ($row['cnt'] ?? 0);
+    }
+
+    /**
+     * @param list<string> $gridKeys
+     */
+    private function loadMigrationFilesForGridKeys(array $gridKeys): void
+    {
+        $migrationsDir = __DIR__ . DIRECTORY_SEPARATOR;
+        $filesToLoad = [];
+
+        foreach ($gridKeys as $gridKey) {
+            $plan = self::GRID_REPAIR_PLAN[$gridKey];
+            $filesToLoad[$plan['seed']['file']] = true;
+
+            foreach ($plan['patches'] ?? [] as $patch) {
+                $filesToLoad[$patch['file']] = true;
+            }
+        }
+
+        foreach (array_keys($filesToLoad) as $fileName) {
+            require_once $migrationsDir . $fileName;
+        }
+    }
+
+    private function runChildMigration(string $migrationClass): void
+    {
+        /** @var AbstractMigration $migration */
+        $migration = new $migrationClass();
+        $migration->setAdapter($this->getAdapter());
+        $migration->setOutput($this->output);
+        $migration->up();
+    }
+
+    private function bootstrapModx(): \MODX\Revolution\modX
+    {
+        $modxConfigPath = dirname(__FILE__, 5) . '/config.core.php';
+        if (!file_exists($modxConfigPath)) {
+            throw new \RuntimeException('MODX config.core.php not found');
+        }
+
+        require_once $modxConfigPath;
+        if (!defined('MODX_CORE_PATH')) {
+            throw new \RuntimeException('MODX_CORE_PATH not defined');
+        }
+
+        require_once MODX_CORE_PATH . 'vendor/autoload.php';
+        require_once MODX_CORE_PATH . 'model/modx/modx.class.php';
+
+        $modx = new \MODX\Revolution\modX();
+        $modx->initialize('mgr');
+
+        $modelPath = MODX_CORE_PATH . 'components/minishop3/src/Model/';
+        $modx->addPackage('MiniShop3\\Model', $modelPath, null, 'MiniShop3\\');
+
+        return $modx;
+    }
+}
diff --git a/core/components/minishop3/schema/minishop3.mysql.schema.xml b/core/components/minishop3/schema/minishop3.mysql.schema.xml
index ec4c333d..187eb075 100644
--- a/core/components/minishop3/schema/minishop3.mysql.schema.xml
+++ b/core/components/minishop3/schema/minishop3.mysql.schema.xml
@@ -622,8 +622,8 @@
         <field key="config" dbtype="text" phptype="json" null="true"/>
         <field key="is_system" dbtype="tinyint" precision="1" phptype="boolean" null="false" default="0"/>
         <field key="is_default" dbtype="tinyint" precision="1" phptype="boolean" null="false" default="1"/>
-        <field key="created_at" dbtype="timestamp" phptype="timestamp" null="false" default="CURRENT_TIMESTAMP"/>
-        <field key="updated_at" dbtype="timestamp" phptype="timestamp" null="true" extra="on update CURRENT_TIMESTAMP"/>
+        <field key="created_at" dbtype="datetime" phptype="datetime" null="false" default="CURRENT_TIMESTAMP"/>
+        <field key="updated_at" dbtype="datetime" phptype="datetime" null="true"/>
 
         <index alias="idx_grid_field" name="idx_grid_field" primary="false" unique="true" type="BTREE">
             <column key="grid_key" length="" collation="A" null="false"/>
diff --git a/core/components/minishop3/src/Model/mysql/msGridField.php b/core/components/minishop3/src/Model/mysql/msGridField.php
index f46810ff..5717c99b 100644
--- a/core/components/minishop3/src/Model/mysql/msGridField.php
+++ b/core/components/minishop3/src/Model/mysql/msGridField.php
@@ -123,16 +123,15 @@ class msGridField extends \MiniShop3\Model\msGridField
                 'default' => 1,
             ],
             'created_at' => [
-                'dbtype' => 'timestamp',
-                'phptype' => 'timestamp',
+                'dbtype' => 'datetime',
+                'phptype' => 'datetime',
                 'null' => false,
                 'default' => 'CURRENT_TIMESTAMP',
             ],
             'updated_at' => [
-                'dbtype' => 'timestamp',
-                'phptype' => 'timestamp',
+                'dbtype' => 'datetime',
+                'phptype' => 'datetime',
                 'null' => true,
-                'extra' => 'on update CURRENT_TIMESTAMP',
             ],
         ],
         'indexes' => [