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 ('1ff53f524c3926189476a1c9960bc865','0','18.118.126.241','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714916893','board.php?boardid=363&sid=3bc9f4591ab5a10e4c5a05980342444f','0','0','')
mysql error: Duplicate entry '1ff53f524c3926189476a1c9960bc865' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 05.05.2024 @ 15:48
Script: /board.php?boardid=363&sid=3bc9f4591ab5a10e4c5a05980342444f
Referer: http://wehrbauten.de/board.php?boardid=363&sid=3bc9f4591ab5a10e4c5a05980342444f