SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('e022f47111bcfd9b87f2f2c24cae3104','0','3.237.97.64','CCBot/2.0 (https://commoncrawl.org/faq/)','1614774232','forgotpw.php','0','0','')
mysql error: The table 'bb1_sessions' is full
mysql error number: 1114
mysql version: 5.6.44-nmm1-log
php version: 5.6.38-nmm2
Date: 03.03.2021 @ 13:23
Script: /forgotpw.php
Referer: