How to edit map

Is it possible to remove part of a map as my robot has tried to map beyond my front door. I guess the door was open once when it was cleaning.
I can't seem to remove that area.
Can it be done? If not then can this facility be added to the app?
Thanks

Message d'erreur dès que je lance l'application

You can go in wdit map and there is the possibility to hide it

Hello, currently we do not support deleting a part of the map. If you do not want the robot to clean that area, you can add a virtual wall to separate the area.

Thanks for the reply, that's a shame. So the only way to resolve it is to delete the map and start a new mapping run.
Until the same thing happens again.
A good thing would to be able to lick the map so it can't add any new areas. That way it couldn't happen.
Also the dividing rooms feature is frustrating as it doesn't allow you to divide them in the correct location. Only where it thinks you should be dividing it.