How to install everything without getting an error? [duplicate]

You have to use a trick - create needed user, remove package, then remove user:

sudo useradd deepin-anything-server
sudo apt-get purge deepin-anything-server
sudo userdel deepin-anything-server

and then for other DKMS-related package

sudo apt-get purge deepin-anything-dkms
sudo dpkg -P --force-all deepin-anything-dkms

Then update package lists and fix package system:

sudo apt-get update
sudo apt-get install -f

If you want to remove Ubuntu DDE stable PPA - remove it with its packages by

sudo apt-get install ppa-purge
sudo ppa-purge ppa:ubuntudde-dev/stable

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