甲骨文ARM ubuntu更新源404不能更新了？

这个问题怎样排除

Hit:1 https://download.docker.com/linux/ubuntu focal InRelease
Hit:2 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease
Hit:3 http://ap-singapore-1-ad-1.clouds.ports.ubuntu.com/ubuntu-ports focal InRelease
Hit:4 http://nginx.org/packages/mainline/ubuntu focal InRelease
Hit:5 http://ap-singapore-1-ad-1.clouds.ports.ubuntu.com/ubuntu-ports focal-updates InRelease
Hit:6 http://ap-singapore-1-ad-1.clouds.ports.ubuntu.com/ubuntu-ports focal-backports InRelease
Ign:7 http://ppa.launchpad.net/wiznote-team/ppa/ubuntu focal InRelease
Err:9 http://ppa.launchpad.net/wiznote-team/ppa/ubuntu focal Release
404 Not Found [IP: 2620:2d:4000:1::81 80]
Hit:8 https://packagecloud.io/ookla/speedtest-cli/ubuntu focal InRelease
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/wiznote-team/ppa/ubuntu focal Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.