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 ('894f4e5002a57b9c6082492e68af43a9','0','18.216.73.219','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1717207436','register.php?sid=c4b6b1fbf983dd2610006f726fe9899e','0','0','')
mysql error: Duplicate entry '894f4e5002a57b9c6082492e68af43a9' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 01.06.2024 @ 04:03
Script: /register.php?sid=c4b6b1fbf983dd2610006f726fe9899e
Referer: