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 ('9dcd72c66ecc69edeeb06545bfe18467','0','18.118.137.243','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715162181','thread.php?goto=lastpost&threadid=591&sid=66399ef07accb5327c6f982b9bd294f1','0','0','')
mysql error: Duplicate entry '9dcd72c66ecc69edeeb06545bfe18467' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 08.05.2024 @ 11:56
Script: /thread.php?goto=lastpost&threadid=591&sid=66399ef07accb5327c6f982b9bd294f1
Referer: