SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: SELECT t.* FROM bb1_threads t WHERE t.threadid = '188434'
mysql error: Out of resources when opening file './usr_web1_2/bb1_threads.MYD' (Errcode: 24)
mysql error number: 23
mysql version: 5.5.47-0+deb6u1-log
php version: 5.3.3-7+squeeze29
Date: 06.07.2020 @ 18:39
Script: /editpost.php?postid=4066213
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