SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('c47b5f7eccdbf5beb979033a5a954be5','0','3.144.86.138','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714684622','board.php?boardid=103&sid=8acbe839920a0e8e3a5a0d2273d0e7e8','0','0','')
mysql error: Duplicate entry 'c47b5f7eccdbf5beb979033a5a954be5' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.5.23-MariaDB-0+deb11u1
php version: 5.6.40
Date: 02.05.2024 @ 23:17
Script: /board.php?boardid=103&sid=8acbe839920a0e8e3a5a0d2273d0e7e8
Referer: http://mainboard.ppg-clan.de/board.php?boardid=103&sid=8acbe839920a0e8e3a5a0d2273d0e7e8