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 ('42a3c49e5b6e82a1256db31e12a4c672','0','3.142.195.225','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716194692','calendar.php?sid=27a4c8d5cbf7cab21b2090ee0a734ea9','0','0','')
mysql error: Duplicate entry '42a3c49e5b6e82a1256db31e12a4c672' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 4.4.9
Date: 20.05.2024 @ 10:44
Script: /board/calendar.php?sid=27a4c8d5cbf7cab21b2090ee0a734ea9
Referer: