SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: UPDATE bb1_jgs_hits SET s17=s17+1 WHERE date = '30-09-2014'
mysql error: Unknown column 's17' in 'field list'
mysql error number: 1054
mysql version: 5.5.31-1~dotdeb.0
php version: 4.4.9-0.dotdeb.1
Date: 30.09.2014 @ 17:49
Script: /thread.php?postid=17
Referer: