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 ('f0fd4faf245cce8435b5e83288fe44f3','0','18.190.153.144','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716407029','calendar.php?sid=7a6f4db46b195e11e67163503c8161f9','0','0','')
mysql error: Duplicate entry 'f0fd4faf245cce8435b5e83288fe44f3' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.3.39-MariaDB-0+deb10u2
php version: 5.6.40-0+deb8u12
Date: 22.05.2024 @ 21:43
Script: /calendar.php?sid=7a6f4db46b195e11e67163503c8161f9
Referer: