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='54.160.153.233') WHERE t.threadid = '6027'
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: 25.02.2018 @ 18:35
Script: /thread.php?postid=34204&sid=978365d21516f437989c9f1f616fcc3d
Referer: