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 ('b9737207acd31050dfa7ad9ec120b6f8','0','18.117.238.40','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715564620','board.php?boardid=234&sid=51f2e4e96ea9088b5901896bca5cfbaf','0','0','')
mysql error: Duplicate entry 'b9737207acd31050dfa7ad9ec120b6f8' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 03:43
Script: /board.php?boardid=234&sid=51f2e4e96ea9088b5901896bca5cfbaf
Referer: