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 ('26912a71fa11e0a0f52b59e665635d93','0','18.218.209.8','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714268777','board.php?boardid=1&sid=12c17a14f6b5f105ad205cf55f180c42','0','0','')
mysql error: Duplicate entry '26912a71fa11e0a0f52b59e665635d93' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.5.23-MariaDB-0+deb11u1
php version: 5.6.40
Date: 28.04.2024 @ 03:46
Script: /board.php?boardid=1&sid=12c17a14f6b5f105ad205cf55f180c42
Referer: