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 ('b84a4ad2899f739b756b090c464dbeb4','0','52.14.240.178','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715153411','jgs_portal.php?sid=8374e425e0873e5e13858a93232df1f2','0','0','')
mysql error: Duplicate entry 'b84a4ad2899f739b756b090c464dbeb4' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 08.05.2024 @ 09:30
Script: /jgs_portal.php?sid=8374e425e0873e5e13858a93232df1f2
Referer: http://wehrbauten.de/jgs_portal.php?sid=8374e425e0873e5e13858a93232df1f2