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 ('f1968add9b84af39593a96218cb16404','0','3.23.127.197','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714822278','formmail.php?threadid=2254&sid=e63c774fb02f80080e9803d32921f896','0','0','')
mysql error: Duplicate entry 'f1968add9b84af39593a96218cb16404' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 13:31
Script: /formmail.php?threadid=2254&sid=e63c774fb02f80080e9803d32921f896
Referer: http://wehrbauten.de/formmail.php?threadid=2254&sid=e63c774fb02f80080e9803d32921f896