I'm using Altium Designer and can't work out what should be a simple design rule.

I have a ground plane (polygon) in which I want to have a small area not covered. The area in question does have a few components and a couple of tracks.
I created a keepout region and the ground plane polygon pours around it like it should. But... there are violations between the keepout region and those few components and tracks.
How to I implement the design rule for this? Have I used the wrong method in the keepout?