Index: modules/system/system.install
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.install,v
retrieving revision 1.451
diff -u -p -r1.451 system.install
--- modules/system/system.install	1 Mar 2010 07:39:12 -0000	1.451
+++ modules/system/system.install	1 Mar 2010 17:25:01 -0000
@@ -1599,6 +1599,16 @@ function system_update_6053() {
 }
 
 /**
+ * Improve indexes on the {url_alias} table.
+ */
+function system_update_6055() {
+  db_drop_index('url_alias', 'src_language');
+  db_drop_unique_key('url_alias', 'dst_language');
+  db_add_index('url_alias', 'src_language_pid', array('src', 'language', 'pid'));
+  db_add_unique_key('url_alias', 'dst_language_pid', array('dst', 'language', 'pid'));
+}
+
+/**
  * @} End of "defgroup updates-6.x-extra"
  * The next series of updates should start at 7000.
  */
@@ -2027,16 +2037,6 @@ function system_update_7024() {
 }
 
 /**
- * Improve indexes on the {url_alias} table.
- */
-function system_update_7025() {
-  db_drop_index('url_alias', 'src_language');
-  db_drop_index('url_alias', 'dst_language');
-  db_add_index('url_alias', 'dst_language_pid', array('dst', 'language', 'pid'));
-  db_add_index('url_alias', 'src_language_pid', array('src', 'language', 'pid'));
-}
-
-/**
  * Increase permitted length of url aliases to 255 characters.
  *
  */