E: The repository 'https://download.docker.com/linux/debian focal Release' does not have a Release file [duplicate]
Run
sudo gedit /etc/apt/sources.list.d/docker.list
comment the line, save, voila! Finished, your problem solved!
Run
sudo gedit /etc/apt/sources.list.d/docker.list
comment the line, save, voila! Finished, your problem solved!