Index: branches/unlabeled/unlabeled-1.9.2/kernel/units/relationship/relationship_event_handler.php
===================================================================
diff -u -r6866 -r7018
--- branches/unlabeled/unlabeled-1.9.2/kernel/units/relationship/relationship_event_handler.php	(.../relationship_event_handler.php)	(revision 6866)
+++ branches/unlabeled/unlabeled-1.9.2/kernel/units/relationship/relationship_event_handler.php	(.../relationship_event_handler.php)	(revision 7018)
@@ -235,6 +235,8 @@
 				if ($prefix == 'm') {
 					$prefix = 'c';
 				}
+				if (!$this->Application->prefixRegistred($prefix)) continue;
+				
 				$configs[$prefix] = $this->Application->getUnitOptions($prefix);
 				if($configs[$prefix] === false) unset($configs[$prefix]);
 				if(!isset($configs[$prefix]['CatalogItem']) || !$configs[$prefix]['CatalogItem']) unset($configs[$prefix]);