需要帮助解决这些错误，我正在从 Raspberry Pi Imager 运行 Ubuntu 版本（21.10）。
Reading package lists... Done
E: The repository 'http://ports.ubuntu.com/ubuntu-ports impish Release' no longer has 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.
E: The repository 'http://ports.ubuntu.com/ubuntu-ports impish-updates Release' no longer has 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.
E: The repository 'http://ports.ubuntu.com/ubuntu-ports impish-backports Release' no longer has 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.
E: The repository 'http://ports.ubuntu.com/ubuntu-ports impish-security Release' no longer has 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.
任何帮助都将不胜感激。〜Blood