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 ('eee9b4c7765f368fe45fd5b3d47b7eaf','0','18.219.11.19','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715857573','board.php?boardid=290&sid=d4923accd7b70ec1c609658624dc5d74','0','0','')
mysql error: Duplicate entry 'eee9b4c7765f368fe45fd5b3d47b7eaf' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 16.05.2024 @ 13:06
Script: /board.php?boardid=290&sid=d4923accd7b70ec1c609658624dc5d74
Referer: http://wehrbauten.de/board.php?boardid=290&sid=d4923accd7b70ec1c609658624dc5d74