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 ('12486ed6d462ebaa1108f01877782190','0','3.15.147.215','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714482679','calendar.php?sid=d66b0afe3cb2be2a1d15aac90c789348','0','0','')
mysql error: Duplicate entry '12486ed6d462ebaa1108f01877782190' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 30.04.2024 @ 15:11
Script: /calendar.php?sid=d66b0afe3cb2be2a1d15aac90c789348
Referer: