easy to explain lets go :
1. Open notepad and put this
delete from `spawnlist` where `npc_templateid` in (SELECT `id` FROM `npc` WHERE type` = 'L2Monster' AND `title` = '');
2. Save as delete.sql (ofc its example) .
3. Open Navicat click twice on localhost then right-click in our database (default name is l2jdb) select execute SQL from a file and select your file called delete.sql and click excute and all finished ;)