SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: SELECT t.*, v.id AS isvoted FROM bb1_threads t LEFT JOIN bb1_votes v ON (v.id=t.threadid AND v.votemode=2 AND v.ipaddress='23.20.196.179') WHERE t.threadid = '768'
mysql error: Unknown column 'v.votemode' in 'on clause'
mysql error number: 1054
mysql version: 4.0.27--maxd0-log
php version: 4.4.9
Date: 22.05.2013 @ 05:04
Script: /thread.php?threadid=768
Referer: