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 ('e3a9f61dc6655c8bfb253507806f463f','0','18.221.187.207','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715502160','thread.php?goto=lastpost&threadid=572&sid=23a05d8750b9c59081e0c1b8c1ecc595','0','0','')
mysql error: Duplicate entry 'e3a9f61dc6655c8bfb253507806f463f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 12.05.2024 @ 10:22
Script: /thread.php?goto=lastpost&threadid=572&sid=23a05d8750b9c59081e0c1b8c1ecc595
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=572&sid=23a05d8750b9c59081e0c1b8c1ecc595