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='54.80.226.185') WHERE t.threadid = '6792'
mysql error: Unknown column 'v.votemode' in 'on clause'
mysql error number: 1054
mysql version: 5.5.57-0+deb7u1-log
php version: 5.6.31
Date: 22.08.2017 @ 16:37
Script: /thread.php?threadid=6792&sid=fccafa2fd21c2d86763b94950b3c6994
Referer: