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 ('cb9d4f61428cb72f9a6fc4056ad1966c','0','3.15.6.77','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714984694','index.php?sid=ad3b62cddef1850a15480ee68b6128f8','0','0','')
mysql error: Duplicate entry 'cb9d4f61428cb72f9a6fc4056ad1966c' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 10:38
Script: /index.php?sid=ad3b62cddef1850a15480ee68b6128f8
Referer: