Strange db error

[cbiweb]

Working with an old community that's been offline for some time, but trying to resurrect it. It is version 3.5.1. I've moved it all onto my local machine for development, and it seems to be working fine except for a db error I'm getting locally, but not online.

At the bottom of each page is something like this:

Database error in vBulletin 3.5.1:

Invalid SQL:

                    UPDATE session
                    SET lastactivity = 1248702330, location = '/CBIWEB/dev/warmongers/forums.php?', loggedin = 2, inforum = 0, inthread = 0, incalendar = 0, badlocation = 0, useragent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1 (.NET CLR 3.5.30729)'
                    WHERE sessionhash = '4cdfbadb681f202266e7dc0e9dfcace8';

MySQL Error  : Data too long for column 'useragent' at row 1
Error Number : 1406
Date         : Monday, July 27th 2009 @ 10:45:30 AM
Script       : http://localhost/CBIWEB/dev/warmongers/forums.php?
Referrer     : http://localhost/CBIWEB/dev/warmongers/login.php
IP Address   : 127.0.0.1
Username     : cbiweb
Classname    : vB_Database

Why does this happen on my local machine but not on the production server?

[cbiweb]

oops... ignore the above post. I'm running mysql in strict mode, and had to change this

$config['Database']['force_sql_mode'] = false;

to this

$config['Database']['force_sql_mode'] = true;