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 ('aebbd6cc8c5028881a65c56480d0fd52','0','3.15.4.244','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715453924','index.php?sid=4a8b54ec4b85756b241a5b602407c693','0','0','')
mysql error: Duplicate entry 'aebbd6cc8c5028881a65c56480d0fd52' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 11.05.2024 @ 20:58
Script: /index.php?sid=4a8b54ec4b85756b241a5b602407c693
Referer: