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 ('ee7a5b52c2e73c8a7806fd5e3e4c4787','0','18.221.154.151','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714757814','thread.php?goto=lastpost&threadid=2305&sid=c355ff9137dc40137a75b8a70bd63f9f','0','0','')
mysql error: Duplicate entry 'ee7a5b52c2e73c8a7806fd5e3e4c4787' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 03.05.2024 @ 19:36
Script: /thread.php?goto=lastpost&threadid=2305&sid=c355ff9137dc40137a75b8a70bd63f9f
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=2305&sid=c355ff9137dc40137a75b8a70bd63f9f