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='50.19.34.255') WHERE t.threadid = '720'
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: 18.02.2018 @ 19:14
Script: /thread.php?threadid=720&sid=9bc2a0a4e8c5ffa8be12d6e8d4b1283b
Referer: