Index: kernel/db/cat_event_handler.php
===================================================================
--- kernel/db/cat_event_handler.php	(revision 14733)
+++ kernel/db/cat_event_handler.php	(working copy)
@@ -2282,10 +2282,12 @@
 	{
 		parent::OnBeforeClone($event);
 
+		$object =& $event->getObject();
+		/* @var $object kDBItem */
+
+		$object->SetDBField('ResourceId', 0); // this will reset it
+
 		if ( $this->Application->GetVar('ResetCatBeforeClone') ) {
-			$object =& $event->getObject();
-			/* @var $object kDBItem */
-
 			$object->SetDBField('CategoryId', null);
 		}
 	}
Index: units/categories/categories_event_handler.php
===================================================================
--- units/categories/categories_event_handler.php	(revision 14733)
+++ units/categories/categories_event_handler.php	(working copy)
@@ -2843,4 +2843,23 @@
 				$object->SetDBField('ResourceId', $this->Application->NextResourceId());
 			}
 		}
+
+		/**
+		 * Occurs before an item has been cloned
+		 * Id of newly created item is passed as event' 'id' param
+		 *
+		 * @param kEvent $event
+		 * @return void
+		 * @access protected
+		 */
+		protected function OnBeforeClone(&$event)
+		{
+			parent::OnBeforeClone($event);
+
+			$object =& $event->getObject();
+			/* @var $object kDBItem */
+
+			$object->SetDBField('ResourceId', 0); // this will reset it
+
+		}
 	}
\ No newline at end of file