Graph is linked to private object(s) in an external package: LandscapeMateriaInstancConst


We are trying to rename our root project folder and running into an issue where the maps wont save. It spits out this error for each map:

Could anyone guide me in the right direction as I am really not sure what to make of LandscapeMaterialInstanceConstant and how to solve it. Is it the landscape shader or something with the layers?