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 ('a9d6a958669ab77b71a80885f466f922','0','18.191.223.123','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715757317','thread.php?threadid=188626&sid=8a94ceab46ec6932678fefda81e629bc','0','0','')
mysql error: Duplicate entry 'a9d6a958669ab77b71a80885f466f922' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.1.48-MariaDB-0ubuntu0.18.04.1
php version: 7.4.33
Date: 15.05.2024 @ 09:15
Script: /thread.php?threadid=188626&sid=8a94ceab46ec6932678fefda81e629bc
Referer: http://www.gegen-bilderklau.net/thread.php?threadid=188626&sid=8a94ceab46ec6932678fefda81e629bc