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 ('6215d27a9f840f477c29ec3ccd37c89b','0','18.118.161.220','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715670909','board.php?boardid=38&sid=ff5d74da0cafb678319cf433c82a4dab','0','0','')
mysql error: Duplicate entry '6215d27a9f840f477c29ec3ccd37c89b' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 09:15
Script: /board.php?boardid=38&sid=ff5d74da0cafb678319cf433c82a4dab
Referer: http://wehrbauten.de/board.php?boardid=38&sid=ff5d74da0cafb678319cf433c82a4dab