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 ('c471075f86dd658a01370e52d65f2b1d','0','3.138.116.20','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714855060','formmail.php?threadid=1052&sid=611f8117e7e0e97e9bbf6c5db0993e88','0','0','')
mysql error: Duplicate entry 'c471075f86dd658a01370e52d65f2b1d' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 22:37
Script: /formmail.php?threadid=1052&sid=611f8117e7e0e97e9bbf6c5db0993e88
Referer: http://wehrbauten.de/formmail.php?threadid=1052&sid=611f8117e7e0e97e9bbf6c5db0993e88