Unmet dependencies - you have held broken packages

This issue happens when dependencies get messed up at least in Ubuntu. Here is an example that I corrected today when I could not install vim:

sudo apt-get install vim
...
The following packages have unmet dependencies:
 libpython3.8 : Depends: libpython3.8-stdlib (= 3.8.5-1~20.04.2) but 3.8.6-1 is to be installed
E: Unable to correct problems, you have held broken packages.

To resolve it you need to clean, autoclean, autoremove, update, upgrade, remove, and retry install while removing any further broken dependencies:

sudo apt-get -y clean
sudo apt-get -y autoclean
sudo apt -y autoremove
sudo apt-get -y update
sudo apt-get -y upgrade
sudo apt-get remove -y libpython3.8-stdlib # game me unmet dependency on libpython3.8-minimal
sudo apt-get remove -y libpython3.8-minimal
sudo apt-get install -y libpython3.8-stdlib
sudo apt-get install -y vim