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 ('177df97a46efc4d926c317127e557c1c','0','18.118.16.229','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715442005','calendar.php?sid=17a112dce422070ee341c15ab90096ba','0','0','')
mysql error: Duplicate entry '177df97a46efc4d926c317127e557c1c' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 11.05.2024 @ 17:40
Script: /calendar.php?sid=17a112dce422070ee341c15ab90096ba
Referer: