Fix crash about undefined array key

Author: stonebuzz

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Fixed
+
+- Fix crash about undefined array key
 
 ## [1.21.7] - 2024-02-22
 

inc/container.class.php

@@ -1439,13 +1439,12 @@ public static function validateValues($data, $itemtype, $massiveaction)
             'plugin_fields_containers_id' => $data['plugin_fields_containers_id']
         ]);
 
-
         $status_value = null;
-        $relatedItem = new $data['itemtype']();
         $status_field_name = PluginFieldsStatusOverride::getStatusFieldName($itemtype);
         if ($container->fields['type'] === 'dom') {
             $status_value = $data[$status_field_name] ?? null;
         } else {
+            $relatedItem = new $itemtype();
             $status_value = $relatedItem->fields[$status_field_name] ?? null;
         }
         // Apply status overrides