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 ('084781fec3c07ce2e54bc563627f1709','0','18.223.24.90','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715670027','board.php?boardid=259&page=1&daysprune=1000&sortfield=starter&sortorder=ASC&sid=a9c124e5785f1821822cabfe6ff83777','0','0','')
mysql error: Duplicate entry '084781fec3c07ce2e54bc563627f1709' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 09:00
Script: /board.php?boardid=259&page=1&daysprune=1000&sortfield=starter&sortorder=ASC&sid=a9c124e5785f1821822cabfe6ff83777
Referer: http://wehrbauten.de/board.php?boardid=259&page=1&daysprune=1000&sortfield=starter&sortorder=ASC&sid=a9c124e5785f1821822cabfe6ff83777