diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4370626e..c33b7a3e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Fix crash when injection model has no mandatory fields defined
 - Fix models created on parent entities can't be used on child entites
+- Fix association of imported data with non-existing groups when the group column is empty in the import file
 
 ## [2.15.4] - 2026-03-16
 
diff --git a/inc/commoninjectionlib.class.php b/inc/commoninjectionlib.class.php
index 8980b4c1..2c7b6afd 100644
--- a/inc/commoninjectionlib.class.php
+++ b/inc/commoninjectionlib.class.php
@@ -28,6 +28,7 @@
  * -------------------------------------------------------------------------
  */
 use Glpi\Exception\Http\HttpException;
+use Glpi\Features\AssignableItem;
 
 use function Safe\preg_match;
 use function Safe\preg_replace;
@@ -963,8 +964,14 @@ private function setValueForItemtype($itemtype, $field, $value, $fromdb = false)
             ];
             if (empty($value) && $value !== 0 && $value !== '0') {
                 if (isForeignKeyField($field) || (str_contains($field, 'is_')) || (method_exists($injectionClass, 'isNullable') && !$injectionClass->isNullable($field))) {
-                    // If the field is an id, we set it to 0
-                    $this->values[$itemtype][$field] = self::DROPDOWN_EMPTY_VALUE;
+                    //If the field concernes groupds, unseting it instead of setting it to 0 in order to avoid associating the item to a non existing group (id 0)
+                    $group_fields = ['groups_id_tech', 'groups_id', 'groups_id_normal'];
+                    if (in_array($field, $group_fields) && Toolbox::hasTrait($itemtype, AssignableItem::class)) {
+                        unset($this->values[$itemtype][$field]);
+                    } else {
+                        // If the field is an id, we set it to 0
+                        $this->values[$itemtype][$field] = self::DROPDOWN_EMPTY_VALUE;
+                    }
                 } else {
                     // Else we set it to NULL
                     $this->values[$itemtype][$field] = self::EMPTY_VALUE;