SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.1.5): Invalid SQL: UPDATE bb2_sponsoren SET views=views+1 WHERE sponsorid='12'
mysql error: Can't open file: './usr_web1_15/bb2_sponsoren.frm' (errno: 24)
mysql error number: 1016
mysql version: 5.5.47-0+deb6u1-log
php version: 5.3.3-7+squeeze29
Date: 04.07.2020 @ 14:22
Script: /thread.php?threadid=40&
Referer: