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='54.144.14.134') WHERE t.threadid = '6810'
mysql error: Unknown column 'v.votemode' in 'on clause'
mysql error number: 1054
mysql version: 5.5.59-0+deb7u1-log
php version: 5.6.35
Date: 20.04.2018 @ 05:11
Script: /thread.php?threadid=6810&sid=88b441441b16647f09445100463558bc
Referer: