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 ('a4c841ad3da63295c50f5a511af1bcb9','0','3.137.192.3','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714978885','board.php?boardid=232&sid=e9805f6aa9bde3185f378e5b52dfec4b','0','0','')
mysql error: Duplicate entry 'a4c841ad3da63295c50f5a511af1bcb9' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 09:01
Script: /board.php?boardid=232&sid=e9805f6aa9bde3185f378e5b52dfec4b
Referer: