SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: SELECT * FROM bb1_posts WHERE postid = '7808'
mysql error: Out of resources when opening file './usr_web1_2/bb1_posts.MYD' (Errcode: 24)
mysql error number: 23
mysql version: 5.5.47-0+deb6u1-log
php version: 5.3.3-7+squeeze29
Date: 03.07.2020 @ 18:25
Script: /addreply.php?action=quote&postid=7808
Referer: