Topic: Error upgrading from 1.2.16 to 1.3.1

I followed the upgrade instructions and everything SEEMED to work until I tried to click on any topic.  Then I got this message:

The error occurred on line 116 in /var/www/forums/viewforum.php

Something about the database being corrupt or a logic error.

This only happens to logged-in users.  Guest users have no problems traversing the forum.

I noticed that another post here closed an issue exactly like this.  I can not use her solution, however, since my forums are active and I simply can't delete/reinstantiate all my topics.

Any ideas?

Re: Error upgrading from 1.2.16 to 1.3.1

Are there any errors at the page, except this? Enable debug mode to see others errors. To do this add this line to config.php

define('FORUM_DEBUG', 1);