当我尝试更新（sudo agt-get update）时遇到此问题，更新完成后出现错误的完整日志是：
E: The repository 'file:/var/cudnn-local-repo-ubuntu2004-8.4.1.50 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.
E: The repository 'file:/var/cudnn-local-repo-ubuntu2004-8.6.0.163 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.
E: The repository 'file:/var/cudnn-local-repo-ubuntu2204-8.6.0.163 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.
我的系统：
Ubuntu：20.04。arch=x86_64。代号=focal
我找不到与此问题相关的任何内容，有人能帮我解决这个问题吗？
我附上了完整日志的照片：
