Error message while installing after uninstalling the hack

I uninstalled the hack and i tried to install it again and i get the following error message at run queries action:

Database error in vBulletin 3.0.0:

Invalid SQL: INSERT INTO vb3_settinggroup (grouptitle, displayorder, volatile) VALUES ('rpg_battle', '5555', '0')
mysql error: Duplicate entry 'rpg_battle' for key 1

mysql error number: 1062

http://www.***.com/admincp/rpg_insta...ttings&all=yes
Referer: http://www.***.com/admincp/rpg_install.php

As i understand the first installation left entries in the sql and they cant be overwriten so the queries fail... is there a way to bypass this so the hack can be installed?

[Revan]

You must run this:
rpg_install.php?step=uninstall&part=settings
it will remove all settings, then redirect to the done page where vboptions is rebuilt.