Minecraft Worldpainter building protection?

oa
- in Worlds
1

A while ago I created a map with Worldpainter on which I have now built.

I would now like to make a little more space under a building, but since there's some protection around the building (in the form of "X" on the Wp minimap) I wanted to ask whether or how I can deactivate this "protection"

ta

Don't you have a worldedit