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 ('bd4d9c4addf6439d0a852430a9c1ba86','0','18.218.38.125','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714986964','thread.php?goto=lastpost&threadid=1972&sid=ed8f80962d0886e485aa1b18f4d3c996','0','0','')
mysql error: Duplicate entry 'bd4d9c4addf6439d0a852430a9c1ba86' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 11:16
Script: /thread.php?goto=lastpost&threadid=1972&sid=ed8f80962d0886e485aa1b18f4d3c996
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=1972&sid=ed8f80962d0886e485aa1b18f4d3c996