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 ('53f391aba9158b14e9851d796b1b10c3','0','3.145.174.57','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715501596','formmail.php?userid=8&sid=35cbc23d90d38dde6066b78c12c1acf9','0','0','')
mysql error: Duplicate entry '53f391aba9158b14e9851d796b1b10c3' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 12.05.2024 @ 10:13
Script: /formmail.php?userid=8&sid=35cbc23d90d38dde6066b78c12c1acf9
Referer: