Forum Same error every night
 

I keep getting the following error every night around 2 am. Not sure how to correct it

Database error in vBulletin 4.0.5:a

Invalid SQL:

SELECT t_threadid,count(*) as cnt
FROM linkback
GROUP BY t_threadid;

MySQL Error : Table 'myforums.linkback' doesn't exist
Error Number : 1146
Request Date : Tuesday, August 3rd 2010 @ 02:00:44 AM
Error Date : Tuesday, August 3rd 2010 @ 02:00:45 AM
Script : http://www.myforums.com/cron.php?rand=1280826042
Referrer : http://www.myforums.com/f27/
IP Address : xxx.xxx.xxx.xxx
Username : Unregistered
Classname : vB_Database
MySQL Version :