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 ('90a20edf0b4836e85068bc3be573bc16','0','18.117.72.224','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715240153','jgs_portal.php?sid=5393c262ab33dcbdf05bc8e77b43b13a','0','0','')
mysql error: Duplicate entry '90a20edf0b4836e85068bc3be573bc16' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 09.05.2024 @ 09:35
Script: /jgs_portal.php?sid=5393c262ab33dcbdf05bc8e77b43b13a
Referer: http://wehrbauten.de/jgs_portal.php?sid=5393c262ab33dcbdf05bc8e77b43b13a