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 ('b4a5bd4b68fae9e07844240450603449','0','18.222.119.148','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714822111','thread.php?goto=lastpost&threadid=981&sid=63b0ae715f75e6dcf19347a676cdd091','0','0','')
mysql error: Duplicate entry 'b4a5bd4b68fae9e07844240450603449' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 13:28
Script: /thread.php?goto=lastpost&threadid=981&sid=63b0ae715f75e6dcf19347a676cdd091
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=981&sid=63b0ae715f75e6dcf19347a676cdd091