Merge pull request ILIAS-eLearning#7517 from chlulei/8_il_lp_status_array_diff_fix

Fixes array diff call, the structure of the compared arrays did not m…

Author: smeyer-ilias

Services/Tracking/classes/class.ilLPStatus.php

@@ -1,6 +1,5 @@
 <?php
 
-declare(strict_types=0);
 /**
  * This file is part of ILIAS, a powerful learning management system
  * published by ILIAS open source e-Learning e.V.
@@ -17,6 +16,8 @@
  *
  *********************************************************************/
 
+declare(strict_types=0);
+
 /**
  * Abstract class ilLPStatus for all learning progress modes
  * E.g  ilLPStatusManual, ilLPStatusObjectives ...
@@ -889,8 +890,9 @@ protected static function checkLPModesForObjects(
         }
 
         // missing objects in DB (default mode)
+        $existing_obj_ids = array_keys($existing);
         if (sizeof($existing) != sizeof($a_obj_ids)) {
-            foreach (array_diff($a_obj_ids, $existing) as $obj_id) {
+            foreach (array_diff($a_obj_ids, $existing_obj_ids) as $obj_id) {
                 $olp = ilObjectLP::getInstance($obj_id);
                 $mode = $olp->getCurrentMode();
                 if ($mode == ilLPObjSettings::LP_MODE_DEACTIVATED) {