diff --git a/inc/targetbase.class.php b/inc/targetbase.class.php
index 6faeeb5b6..a73e0cceb 100644
--- a/inc/targetbase.class.php
+++ b/inc/targetbase.class.php
@@ -1817,4 +1817,15 @@ protected function showActorSettingsForType($actorType, array $actors) {
 
       echo '</td>';
    }
+
+   public function deleteObsoleteItems(CommonDBTM $container, array $exclude)
+   {
+      $keepCriteria = [
+         self::$items_id => $container->getID(),
+      ];
+      if (count($exclude) > 0) {
+         $keepCriteria[] = ['NOT' => ['id' => $exclude]];
+      }
+      return $this->deleteByCriteria($keepCriteria);
+   }
 }