error change username

[cindy helmond]

hi get this message if a wanne change the username in the admincp :

Database error in vBulletin 3.7.4:

Invalid SQL:


				UPDATE;

MySQL Error   : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
Error Number  : 1064
Request Date  : Wednesday, November 19th 2008 @ 05:16:32 PM
Error Date    : Wednesday, November 19th 2008 @ 05:16:33 PM
Script        : http://www./forum/admincp/user.php?do=update
Referrer      : http://www./forum/admincp/user.php?do=edit&u=1038
IP Address    : 213.93.212.61
Username      : xx
Classname     : vb_database
MySQL Version : 4.1.21-standard-log