我有一些问题。今天看来，昨天还好。这是怎么回事？我该怎么办？我只是想更新 Ubuntusudo apt update
Ign:1 http://archive.ubuntu.com/ubuntu kinetic InRelease
Ign:2 http://archive.ubuntu.com/ubuntu kinetic-updates InRelease
Ign:3 http://archive.ubuntu.com/ubuntu kinetic-backports InRelease
Ign:4 http://archive.ubuntu.com/ubuntu kinetic-security InRelease
Err:5 http://archive.ubuntu.com/ubuntu kinetic Release
404 Not Found [IP: 185.125.190.36 80]
Err:6 http://archive.ubuntu.com/ubuntu kinetic-updates Release
404 Not Found [IP: 185.125.190.36 80]
Err:7 http://archive.ubuntu.com/ubuntu kinetic-backports Release
404 Not Found [IP: 185.125.190.36 80]
Err:8 http://archive.ubuntu.com/ubuntu kinetic-security Release
404 Not Found [IP: 185.125.190.36 80]
Reading package lists... Done
E: The repository 'http://archive.ubuntu.com/ubuntu kinetic Release' no longer has a Release file.
N: Updating from …