Database Error

[McCarroll21]

I ran this compare tool from vb.org (http://www.vbulletin.org/forum/showthread.php?t=209890) on my site and deleted some database tables it said shouldn't be there. Afterwards, I was browsing the forums and tried to mark the forums read and got this database error.

Database error in vBulletin 3.8.4:

Invalid SQL:

        UPDATE vb_session SET
            newposts = NULL
        WHERE userid = 1;

MySQL Error   : Unknown column 'newposts' in 'field list'
Error Number  : 1054
Request Date  : Saturday, October 24th 2009 @ 09:40:24 PM
Error Date    : Saturday, October 24th 2009 @ 09:40:24 PM
Script        : http://www.braves-nation.com/forums/forumdisplay.php?do=markread
Referrer      : http://www.braves-nation.com/forums/

Obviously, this is my fault for not backing up my forums before doing things with the database, but what do I need to do to make this work again? I know I need to re-add one of the items I deleted, but what kind of query do I need to run to make sure I get that back in the right place?



Edit:
I think I've got it. I added a 'newpost' field at the end of 'vb_session' and was then able to mark the forums read. Hopefully I won't run into any other problems with some of the things I deleted.