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 ('d9c0a81d6a538dfb4f80ec6e0a2967ce','0','3.128.190.102','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714992705','thread.php?goto=lastpost&threadid=867&sid=42a1547fb0cb288a6dbd1812b8c0dbec','0','0','')
mysql error: Duplicate entry 'd9c0a81d6a538dfb4f80ec6e0a2967ce' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 12:51
Script: /thread.php?goto=lastpost&threadid=867&sid=42a1547fb0cb288a6dbd1812b8c0dbec
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=867&sid=42a1547fb0cb288a6dbd1812b8c0dbec