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 ('3984744702c1155872f44fbf94a50dc4','0','3.140.185.147','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714988864','board.php?boardid=266&sid=1fade48cc8f3c6a4daf58acda68ce54f','0','0','')
mysql error: Duplicate entry '3984744702c1155872f44fbf94a50dc4' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 11:47
Script: /board.php?boardid=266&sid=1fade48cc8f3c6a4daf58acda68ce54f
Referer: http://wehrbauten.de/board.php?boardid=266&sid=1fade48cc8f3c6a4daf58acda68ce54f