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 ('269ffe64d0d0e03c54cc973f80e4edd3','0','18.226.98.166','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715592916','calendar.php?sid=3a9778485437c86e8d8cc336dc7d0cf9','0','0','')
mysql error: Duplicate entry '269ffe64d0d0e03c54cc973f80e4edd3' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.6.15-MariaDB-cll-lve-log
php version: 5.6.40
Date: 13.05.2024 @ 09:35
Script: /calendar.php?sid=3a9778485437c86e8d8cc336dc7d0cf9
Referer: http://www.biker-community.com/calendar.php?sid=3a9778485437c86e8d8cc336dc7d0cf9