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 ('87220000d22723bb5d7541a3d73530c0','0','3.133.159.224','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715393453','calendar.php?sid=14bfe8fff0309b8b12e5e8e9d71054b2','0','0','')
mysql error: Duplicate entry '87220000d22723bb5d7541a3d73530c0' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 11.05.2024 @ 04:10
Script: /calendar.php?sid=14bfe8fff0309b8b12e5e8e9d71054b2
Referer: http://wehrbauten.de/calendar.php?sid=14bfe8fff0309b8b12e5e8e9d71054b2