Syntax error 1064 (index.php not working)

[Soljah]

I need to know if an index.php can be rebuilt?

I am getting this error:

Database error in vBulletin 3.5.4:

Invalid SQL:
SELECT dateline, userid FROM customavatar WHERE userid =;

MySQL Error : You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
Error Number : 1064
Date : Tuesday, June 6th 2006 @ 03:26:43 PM
Script : http://forum.grownfolkscafe.com/vbpo...rums/index.php
Referrer : http://forum.grownfolkscafe.com/vbpo...s.php?name=GFC
IP Address : 24.1.228.43
Username : Sol
Classname : vb_database

I think this error has alot to do with my index.php not being recognized.

I have no idea how I lost it, but its gone and I cannot navigate from my portal page to my forum page.

Can anyone help?