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 ('52ad51166da3201c263adcc5cbde0d85','0','13.59.154.143','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716275604','formmail.php?userid=298&sid=b1b45e3554841991cb7e4634a62ce65e','0','0','')
mysql error: Duplicate entry '52ad51166da3201c263adcc5cbde0d85' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 21.05.2024 @ 09:13
Script: /formmail.php?userid=298&sid=b1b45e3554841991cb7e4634a62ce65e
Referer: