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='54.81.166.196') WHERE t.threadid = '6623'
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 @ 01:23
Script: /thread.php?threadid=6623&goto=lastpost&sid=63216dafa572efdcc057d88ec43cde9e
Referer: