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 ('276a5f5c22d8071b33df70f2c28e1c2c','0','3.142.124.252','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715429025','calendar.php?month=3&year=2024&sid=70b17bd10509bfd9d41c083205ce0f9f','0','0','')
mysql error: Duplicate entry '276a5f5c22d8071b33df70f2c28e1c2c' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 11.05.2024 @ 14:03
Script: /calendar.php?month=3&year=2024&sid=70b17bd10509bfd9d41c083205ce0f9f
Referer: