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 ('29f84e06807208a26261513a8d6f7a41','0','3.16.54.63','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715208337','calendar.php?sid=d9fd9fe92b7d68322eafa663965015ad','0','0','')
mysql error: Duplicate entry '29f84e06807208a26261513a8d6f7a41' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 09.05.2024 @ 00:45
Script: /calendar.php?sid=d9fd9fe92b7d68322eafa663965015ad
Referer: http://wehrbauten.de/calendar.php?sid=d9fd9fe92b7d68322eafa663965015ad