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 ('e42d6774eeae57c63b135f81b3b17d6d','0','18.117.145.173','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715583640','thread.php?goto=lastpost&threadid=2500&sid=ef5ee9e1111441700e17b23d77d121c0','0','0','')
mysql error: Duplicate entry 'e42d6774eeae57c63b135f81b3b17d6d' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 09:00
Script: /thread.php?goto=lastpost&threadid=2500&sid=ef5ee9e1111441700e17b23d77d121c0
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=2500&sid=ef5ee9e1111441700e17b23d77d121c0