diff --git a/ChangeLog b/ChangeLog
index 023d680ba..d5234cb30 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -11,6 +11,7 @@ $Source$
     * lang/romanian updates, thanks to Valics Lehel
     * lang/thai updates, thanks to Arthit Suriyawongkul.
     * lang/turkish updates, thanks to Bora Alioglu
+    * tbl_relation.php3, bug 570691: query was executed too many times
 
 2002-06-18 Alexander M. Turek  <rabus@users.sourceforge.net>
     * lang/arabic.inc.php3: Changed $cfgPmaAbsoluteUri into $cfg['...'].
diff --git a/tbl_relation.php3 b/tbl_relation.php3
index a1198a864..b020ec680 100644
--- a/tbl_relation.php3
+++ b/tbl_relation.php3
@@ -55,6 +55,7 @@ if ($cfgRelation['relwork']
         } // end if... else....
         if(isset($upd_query)){
             $upd_rs = PMA_query_as_cu($upd_query);
+            unset($upd_query);
         }
     } // end while
 } // end if