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='23.20.157.174') WHERE t.threadid = '3847'
mysql error: Unknown column 'v.votemode' in 'on clause'
mysql error number: 1054
mysql version: 5.1.73-log
php version: 5.6.30
Date: 23.05.2017 @ 08:59
Script: /thread.php?threadid=3847&page=1&sid=4c7aec43879b5845584b97fa2163bb88
Referer: