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 ('caab72a3e42b510bc4d1c59b9574c8a8','0','18.222.138.230','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715040714','board.php?boardid=43&sid=ba772eea7706687c38f9674aebf7de9f','0','0','')
mysql error: Duplicate entry 'caab72a3e42b510bc4d1c59b9574c8a8' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 07.05.2024 @ 02:11
Script: /board.php?boardid=43&sid=ba772eea7706687c38f9674aebf7de9f
Referer: http://wehrbauten.de/board.php?boardid=43&sid=ba772eea7706687c38f9674aebf7de9f