Database error in vBulletin 3.7.2:

Invalid SQL:
UPDATE session SET newposts = newposts+1 WHERE NOT ISNULL(newposts);

MySQL Error   : Unknown column 'newposts' in 'where clause'
Error Number  : 1054
Request Date  : Friday, February 20th 2009 @ 02:19:51 AM
Error Date    : Friday, February 20th 2009 @ 02:19:51 AM
Script        : http://www.*****.com/newthread.php?do=postthread&f=144
Referrer      : http://www.*****.com/newthread.php?do=newthread&f=144
IP Address    : 85.98.30.110
Username      : GÖKTÜRK
Classname     : vB_Database
MySQL Version : 5.0.67-community