我试图在Ubuntu 20.04上安装/卸载、重新安装/修复Mysql和Workbench，但总是会收到以下信息：
Building dependency tree
Reading state information... Done
mysql-server is already the newest version (8.0.20-2ubuntu20.04).
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
libmysqlclient21 : Depends: mysql-common (>= 8.0.20-2ubuntu20.04) but 5.8+1.0.5ubuntu2 is to be installed
mysql-client : Depends: mysql-community-client (= 8.0.20-2ubuntu20.04) but it is not installable
mysql-community-test : Depends: mysql-community-server (= 8.0.20-2ubuntu20.04) but it is not installable
Depends: mysql-community-client (= 8.0.20-2ubuntu20.04) but it is not installable
Depends: libjson-perl but it is not going to be installed
Depends: mysql-community-server-core but it is not installable
mysql-server : Depends: mysql-community-server (= 8.0.20-2ubuntu20.04) but it is not installable
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
当我尝试运行sudo apt --fix-broken install时，出现以下内容：
The following packages have unmet dependencies:
libmysqlclient21 : Depends: mysql-common (>= 8.0.20-2ubuntu20.04) but 5.8+1.0.5ubuntu2 is installed
mysql-client : Depends: mysql-community-client (= 8.0.20-2ubuntu20.04) but it is not installable
mysql-community-test : Depends: mysql-community-server (= 8.0.20-2ubuntu20.04) but it is not installable
Depends: mysql-community-client (= 8.0.20-2ubuntu20.04) but it is not installable
Depends: libjson-perl but it is not installed
Depends: mysql-community-server-core but it is not installable
mysql-server : Depends: mysql-community-server (= 8.0.20-2ubuntu20.04) but it is not installable
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
E: Unable to correct dependencies
对不起，我相信有一个简单的解决方案...但是我找不到它。