ALTER TABLE /*$wgDBprefix*/user_groups CHANGE user_id ug_user INT(5) UNSIGNED NOT NULL DEFAULT '0', CHANGE group_id ug_group INT(5) UNSIGNED NOT NULL DEFAULT '0'; ALTER TABLE /*$wgDBprefix*/user_rights CHANGE user_id ur_user INT(5) UNSIGNED NOT NULL, CHANGE user_rights ur_rights TINYBLOB NOT NULL;