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 ('71c550a79ec469fd14215b4338832bcc','0','18.117.227.194','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715737917','thread.php?goto=lastpost&threadid=2155&sid=b8709ab2e04c6ac301430fe3fb53dd1b','0','0','')
mysql error: Duplicate entry '71c550a79ec469fd14215b4338832bcc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 15.05.2024 @ 03:51
Script: /thread.php?goto=lastpost&threadid=2155&sid=b8709ab2e04c6ac301430fe3fb53dd1b
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=2155&sid=b8709ab2e04c6ac301430fe3fb53dd1b