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 ('1cf527901ed21d7c11843ffe63c466c1','0','3.16.69.1','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715596038','register.php?sid=fbb088ad8f141bf5d08b103b81f49d57','0','0','')
mysql error: Duplicate entry '1cf527901ed21d7c11843ffe63c466c1' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 12:27
Script: /register.php?sid=fbb088ad8f141bf5d08b103b81f49d57
Referer: