Landscape sculpt tool no longer working in certain projects?

hey! I was sculpting a landscape in UE4.25 and while I was doing that, the editor auto-saved the data packages. None of the sculpt brushes work any more and my landscape is stuck in it’s lumpy shape and unfinished.

I’ve tried importing the things into a new level in the project and starting new landscapes in that level but it still doesn’t work? The only time I can get the sculpt tool to work again is if I start a completely new project. But then it stops working once I come back to THIS project

Thank you!