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 ('6a1a1a434e98dc8863d41c3f394e60e4','0','3.144.204.102','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715461805','formmail.php?userid=227&sid=9805835b70257b6e4d677ffb41e5a672','0','0','')
mysql error: Duplicate entry '6a1a1a434e98dc8863d41c3f394e60e4' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 11.05.2024 @ 23:10
Script: /formmail.php?userid=227&sid=9805835b70257b6e4d677ffb41e5a672
Referer: