SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: DELETE FROM bb1_sessions WHERE userid='0' AND ipaddress = '173.245.63.222' AND useragent = 'CCBot/2.0 (http://commoncrawl.org/faq/)'
mysql error: Table 'iphoneci_forum.bb1_sessions' doesn't exist
mysql error number: 1146
mysql version: 10.0.20-MariaDB
php version: 5.4.43
Date: 29.07.2015 @ 21:58
Script: /board.php?boardid=38&daysprune=60&sortfield=replycount&sortorder=ASC&page=2
Referer: