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='54.92.197.82') WHERE t.threadid = '6748'
mysql error: Unknown column 'v.votemode' in 'on clause'
mysql error number: 1054
mysql version: 5.5.59-0+deb7u1-log
php version: 5.6.33
Date: 21.02.2018 @ 14:23
Script: /thread.php?threadid=6748&sid=b8a0a09cd722671d2ffe7e2e76a19c0f
Referer: