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 ('fd391c3446a105bbcebe7574412f55a9','0','3.17.184.90','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715221015','board.php?boardid=554&sid=e473930dc0c60824c1708cd37a9e6906','0','0','')
mysql error: Duplicate entry 'fd391c3446a105bbcebe7574412f55a9' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 09.05.2024 @ 04:16
Script: /board.php?boardid=554&sid=e473930dc0c60824c1708cd37a9e6906
Referer: http://wehrbauten.de/board.php?boardid=554&sid=e473930dc0c60824c1708cd37a9e6906