Database error in vBulletin 3.8.1:

Invalid SQL:

            SELECT prefix.*, prefixpermission.usergroupid AS restriction
            FROM forumprefixset AS forumprefixset
            INNER JOIN prefixset AS prefixset ON (prefixset.prefixsetid = forumprefixset.prefixsetid)
            INNER JOIN prefix AS prefix ON (prefix.prefixsetid = prefixset.prefixsetid)
            LEFT JOIN prefixpermission AS prefixpermission ON (prefix.prefixid = prefixpermission.prefixid)
            WHERE forumprefixset.forumid = 176
            ORDER BY prefixset.displayorder, prefix.displayorder;

MySQL Error   : Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (latin1_general_ci,IMPLICIT) for operation '='
Error Number  : 1267
Request Date  : Wednesday, February 18th 2009 @ 03:55:48 PM
Error Date    : Wednesday, February 18th 2009 @ 03:55:48 PM
Script        : http://www.hericeforum.net/newthread.php?do=newthread&f=176
Referrer      :