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 ('e284f376fa7ab07fc8d079c8aa725107','0','18.221.85.142','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715559354','newthread.php?boardid=561&sid=79cb8244e1f23b6908d31707d6ab093b','0','0','')
mysql error: Duplicate entry 'e284f376fa7ab07fc8d079c8aa725107' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 02:15
Script: /newthread.php?boardid=561&sid=79cb8244e1f23b6908d31707d6ab093b
Referer: http://wehrbauten.de/newthread.php?boardid=561&sid=79cb8244e1f23b6908d31707d6ab093b