大家好，我在带有 Windows 的双启动系统上使用 ubuntu 22.04，最近从 21.04 更新而来。
如果有帮助的话这是运行的结果lsb_release -a：
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04 LTS
Release: 22.04
Codename: jammy
我尝试安装 KiCAD，但运行时sudo apt-get update出现以下错误：
Hit:2 http://in.archive.ubuntu.com/ubuntu impish-updates InRelease
Hit:3 http://packages.microsoft.com/repos/code stable InRelease
Hit:4 http://in.archive.ubuntu.com/ubuntu impish-backports InRelease
Hit:5 https://repo.nordvpn.com/deb/nordvpn/debian stable InRelease
Ign:6 http://security.ubuntu.com/ubuntu impish-security InRelease
Hit:7 http://ppa.launchpad.net/git-core/ppa/ubuntu impish InRelease
Err:8 http://security.ubuntu.com/ubuntu impish-security Release
404 Not Found [IP: 91.189.91.39 80]
Hit:9 http://ppa.launchpad.net/kicad/kicad-6.0-releases/ubuntu impish InRelease
Hit:10 https://ppa.launchpadcontent.net/kicad/kicad-6.0-releases/ubuntu jammy InRelease
Reading package lists... Done
E: The repository 'http://security.ubuntu.com/ubuntu impish-security 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.
我对 Linux 和 Ubuntu 还很陌生，因此希望能够得到一些帮助 :)