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 ('8fd5cba22129427580e4b964c7e989a1','0','3.15.197.123','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714615148','calendar.php?sid=87854d14e23c99ef459f150b2f086330','0','0','')
mysql error: Duplicate entry '8fd5cba22129427580e4b964c7e989a1' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 02.05.2024 @ 03:59
Script: /calendar.php?sid=87854d14e23c99ef459f150b2f086330
Referer: