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 ('900fd4068e96dc25dcd1eaed6dca1980','0','3.145.172.213','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715785643','register.php?sid=c816da991e6c2374c912027849146d86','0','0','')
mysql error: Duplicate entry '900fd4068e96dc25dcd1eaed6dca1980' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 15.05.2024 @ 17:07
Script: /register.php?sid=c816da991e6c2374c912027849146d86
Referer: