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 ('0237f35b297ffab03914c2cb4b6c990b','0','3.129.217.191','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715706707','register.php?sid=e2a44fe0dff53167f1dbd1a0f00fa78e','0','0','')
mysql error: Duplicate entry '0237f35b297ffab03914c2cb4b6c990b' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 14.05.2024 @ 19:11
Script: /register.php?sid=e2a44fe0dff53167f1dbd1a0f00fa78e
Referer: