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='54.162.173.119') WHERE t.threadid = '968'
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 @ 07:00
Script: /thread.php?goto=lastpost&threadid=968&sid=0c1f82c9fbe037cb9f849cb7fa352203
Referer: