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 ('4e8296d4f1a65fb02457de256656242f','0','18.118.193.108','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715675241','board.php?boardid=640&sid=60566e73e06f28616ab7a04dbb39a854','0','0','')
mysql error: Duplicate entry '4e8296d4f1a65fb02457de256656242f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 10:27
Script: /board.php?boardid=640&sid=60566e73e06f28616ab7a04dbb39a854
Referer: http://wehrbauten.de/board.php?boardid=640&sid=60566e73e06f28616ab7a04dbb39a854