Index: branches/5.3.x/core/units/users/users_event_handler.php
===================================================================
diff -u -N -r15938 -r15986
--- branches/5.3.x/core/units/users/users_event_handler.php	(.../users_event_handler.php)	(revision 15938)
+++ branches/5.3.x/core/units/users/users_event_handler.php	(.../users_event_handler.php)	(revision 15986)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: users_event_handler.php 15938 2013-08-14 09:33:06Z alex $
+* @version	$Id: users_event_handler.php 15986 2013-10-07 14:37:54Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -605,12 +605,25 @@
 					$ug_table = $this->Application->GetTempName($ug_table, 'prefix:' . $event->Prefix);
 				}
 
+				$sql = 'SELECT COUNT(*)
+						FROM ' . $ug_table . '
+						WHERE PortalUserId = ' . $object->GetID() . ' AND GroupId = ' . $primary_group_id;
+
+				if ( $this->Conn->GetOne($sql) ) {
+					return;
+				}
+
 				$fields_hash = Array (
 					'PortalUserId' => $object->GetID(),
 					'GroupId' => $primary_group_id,
 				);
 
-				$this->Conn->doInsert($fields_hash, $ug_table, 'REPLACE');
+				if ( $object->IsTempTable() ) {
+					$new_id = (int)$this->Conn->GetOne('SELECT MIN(Id) FROM ' . $ug_table .' WHERE Id < 0' );
+					$fields_hash['Id'] = $new_id - 1;
+				}
+
+				$this->Conn->doInsert($fields_hash, $ug_table);
 			}
 		}