--- /dev/null
+CREATE TABLE /*_*/user_former_groups_tmp (
+ -- Key to user_id
+ ufg_user int unsigned NOT NULL default 0,
+ ufg_group varbinary(255) NOT NULL default '',
+ PRIMARY KEY (ufg_user,ufg_group)
+) /*$wgDBTableOptions*/;
+
+INSERT INTO /*_*/user_former_groups_tmp
+ SELECT * FROM /*_*/user_former_groups;
+
+DROP TABLE /*_*/user_former_groups;
+
+ALTER TABLE /*_*/user_former_groups_tmp RENAME TO /*_*/user_former_groups;
\ No newline at end of file