What is this error that I am receiving?..
 

... Can someone tell me as to why I keep getting the same error message about the same time every day please? And how I correct it? (I receive it at approx 00.02 every night/morning).

Quote:
Database error in vBulletin 3.8.1:

Invalid SQL:

SELECT user.userid, user.salt, user.username, user.email, user.languageid, user.usergroupid, user.membergroupids,
user.timezoneoffset, IF(user.options & 128, 1, 0) AS dstonoff,
IF(user.options & 8192, 1, 0) AS hasaccessmask,
socialgroup.groupid, socialgroup.name, socialgroup.options, socialgroupmember.type AS membertype,
language.dateoverride AS lang_dateoverride, language.timeoverride AS lang_timeoverride, language.locale AS lang_locale
FROM vbsubscribegroup AS subscribegroup
INNER JOIN vbsocialgroup AS socialgroup ON (socialgroup.groupid = subscribegroup.groupid)
INNER JOIN vbuser AS user ON (user.userid = subscribegroup.userid)
LEFT JOIN vbsocialgroupmember AS socialgroupmember ON
(socialgroupmember.userid = user.userid AND socialgroupmember.groupid = socialgroup.groupid)
LEFT JOIN vbusergroup AS usergroup ON (usergroup.usergroupid = user.usergroupid)
LEFT JOIN vblanguage AS language ON (language.languageid = IF(user.languageid = 0, 1, user.languageid))
WHERE subscribegroup.emailupdate = 'daily' AND
socialgroup.lastpost > 1262649613 AND
user.usergroupid 3 AND
(usergroup.genericoptions & 32);

MySQL Error : Unknown column 'subscribegroup.emailupdate' in 'where clause'
Error Number : 1054
Request Date : Wednesday, January 6th 2010 @ 12:02:12 AM
Error Date : Wednesday, January 6th 2010 @ 12:02:13 AM
Script : www.myforumaddress.com/cron.php?rand=1262736132
Referrer : www.myforumaddress.com/search.php?searchid=448543
IP Address : 90.***.***.**
Username : Unregistered
Classname : vB_Database
MySQL Version :