Database error in vBulletin 3.8.6:

Invalid SQL:

					UPDATE krsn_session
					SET lastactivity = 1289823120, location = '/admincp/language.php?do=upload&do=upload', loggedin = 2, inforum = 0, inthread = 0, incalendar = 0, badlocation = 0, useragent = 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; Tablet PC 2.0; .NET4.0C; InfoPath.3; .NET CLR 1.1.4322)', bypass = 0
					WHERE sessionhash = '2ce7078dbad75397529ce88b6ef37fa7';

MySQL Error   : Data too long for column 'useragent' at row 1
Error Number  : 1406
Request Date  : Monday, November 15th 2010 @ 08:12:00 PM
Error Date    : Monday, November 15th 2010 @ 08:12:00 PM
Script        : http://korsanmedya.com/admincp/language.php?do=upload
Referrer      : http://korsanmedya.com/admincp/language.php?do=files
IP Address    : 192.168.1.164
Username      : korsanmedya
Classname     : vB_Database
MySQL Version : 5.1.31-community