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 ('6901b09c0bf06c879451f3a7fef258e1','0','3.141.199.243','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714962036','thread.php?goto=lastpost&threadid=636&sid=9e47b4e8113f25bd4627f28c2ecfb1a7','0','0','')
mysql error: Duplicate entry '6901b09c0bf06c879451f3a7fef258e1' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 04:20
Script: /thread.php?goto=lastpost&threadid=636&sid=9e47b4e8113f25bd4627f28c2ecfb1a7
Referer: