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 ('086a61cae316379a5bc5a41b5edc56a6','0','54.235.55.253','CCBot/2.0 (https://commoncrawl.org/faq/)','1550327832','jgs_portal_box.php?id=18','0','0','')
mysql error: The table 'bb1_sessions' is full
mysql error number: 1114
mysql version: 5.5.60-MariaDB
php version: 5.4.16
Date: 16.02.2019 @ 15:37
Script: /jgs_portal_box.php?id=18
Referer: