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 ('87ed70f46c12bf465b7a911ed2b510f5','0','3.22.181.81','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715071304','addreply.php?action=quote&postid=3596&sid=52738b398ee06cdd5ad4ecafef874aa4','0','0','')
mysql error: Duplicate entry '87ed70f46c12bf465b7a911ed2b510f5' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 07.05.2024 @ 10:41
Script: /addreply.php?action=quote&postid=3596&sid=52738b398ee06cdd5ad4ecafef874aa4
Referer: