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 ('d8a47256eece0ee161a578159b1f3a56','0','18.117.196.217','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715301656','register.php?sid=6628b2e2ddd06a7b2bbf19a55373ced3','0','0','')
mysql error: Duplicate entry 'd8a47256eece0ee161a578159b1f3a56' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 10.05.2024 @ 02:40
Script: /register.php?sid=6628b2e2ddd06a7b2bbf19a55373ced3
Referer: