Can i remove heightmap from landscape?

Hi, I have problem with heightmap which i’ve used to create landscape shape. I can’t sculpt it now freely… In places where heightmap is black, I can’t sculpt below certain level of height, and in places where heightmap is white I can’t sculpt above certain leven of height. It looks like I can sculpt only between minimum height marked as black and maximum marked as white on my height map.

So now my question is: is there possibility to remove the heightmap informations? I don’t want to sculpt landscape terrain all over again :frowning:

Did u try to delete parts u dont need in Manage?