Index: branches/RC/core/units/general/cat_dbitem_export.php
===================================================================
diff -u -r8929 -r9842
--- branches/RC/core/units/general/cat_dbitem_export.php	(.../cat_dbitem_export.php)	(revision 8929)
+++ branches/RC/core/units/general/cat_dbitem_export.php	(.../cat_dbitem_export.php)	(revision 9842)
@@ -831,8 +831,10 @@
 					}
 					$save_method = $item_id && $this->curItem->Load($item_id) ? 'Update' : 'Create';
 					if ($save_method == 'Update') {
-						// replace id from csv file with found id
-						$record_data[ array_search($this->curItem->IDField, $this->exportFields) ] = $item_id;
+						// replace id from csv file with found id (only when ID is found in cvs file)
+						if (in_array($this->curItem->IDField, $this->exportFields)) {
+							$record_data[ array_search($this->curItem->IDField, $this->exportFields) ] = $item_id;
+						}
 					}
 				}