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 ('1b86aca911ab7fecca2167c8b4397bf6','0','3.137.217.134','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715730569','thread.php?goto=lastpost&threadid=644&sid=7bc1b6b88abb92e39efc59333a996b5d','0','0','')
mysql error: Duplicate entry '1b86aca911ab7fecca2167c8b4397bf6' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 15.05.2024 @ 01:49
Script: /thread.php?goto=lastpost&threadid=644&sid=7bc1b6b88abb92e39efc59333a996b5d
Referer: