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 ('90de0169a2b371864e034e8f883ccb91','0','3.139.82.23','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714468383','calendar.php?sid=12b61df0161efd24fe5be2fdb0b5d757','0','0','')
mysql error: Duplicate entry '90de0169a2b371864e034e8f883ccb91' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 30.04.2024 @ 11:13
Script: /calendar.php?sid=12b61df0161efd24fe5be2fdb0b5d757
Referer: