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='23.20.86.177') WHERE t.threadid = '6724'
mysql error: Unknown column 'v.votemode' in 'on clause'
mysql error number: 1054
mysql version: 5.5.57-0+deb7u1-log
php version: 5.6.31
Date: 24.10.2017 @ 00:24
Script: /thread.php?threadid=6724&sid=889266f5fc419b36f53acd270cedfd3c
Referer: