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 ('50412654b42fef3642f992b1f5126293','0','3.19.31.73','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714685689','board.php?boardid=107&sid=539a2e100d3e4bd929de4a0b9c40be47','0','0','')
mysql error: Duplicate entry '50412654b42fef3642f992b1f5126293' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 02.05.2024 @ 23:34
Script: /board.php?boardid=107&sid=539a2e100d3e4bd929de4a0b9c40be47
Referer: http://wehrbauten.de/board.php?boardid=107&sid=539a2e100d3e4bd929de4a0b9c40be47