Class_core issue

[imported_infitech]

Database error in vBulletin 3.5.4:

Invalid SQL:
DELETE FROM productrequirement WHERE product='';

MySQL Error  : 
Error Number : 
Date         : Friday, October 27th 2006 @ 10:57:45 AM
Script       : http://www.forums.infitechdesign.com/admincp/plugin.php
Referrer     : http://www.forums.infitechdesign.com/admincp/plugin.php?do=productadd
IP Address   : 
Username     : sinjix_media
Classname    :

here is the screenshot