SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: SELECT * FROM bb1_posts WHERE postid = '3765639'
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: 08.07.2020 @ 12:29
Script: /addreply.php?postid=3765639
Referer: