Hello all,
Found this problem out after a whole evening to try to program a flight and was thinking I did something wrong.
The solution I now found for this is going in MSFS 2020 to your profile page there go to your content manager. In the search bar look for EDDP. Once found you then can uninstall that update. After that you need to restart the sim.
Now when you plan a flight you can back choose your arrivals.
Of course without the updated airfield…
At any time you can reinstall the update the same way. But you need too to restart the sim to take effect.