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 ('85b6c009c226d47bfb07c8b0d77c9d09','0','3.147.47.82','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716319553','formmail.php?userid=47&sid=ce281cd757e41715bf3eb6ae4a8fc05b','0','0','')
mysql error: Duplicate entry '85b6c009c226d47bfb07c8b0d77c9d09' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 21.05.2024 @ 21:25
Script: /formmail.php?userid=47&sid=ce281cd757e41715bf3eb6ae4a8fc05b
Referer: