"The current thread cannot write 'CollisionFidelity' (lacking capability Plugin)"

[Casonty06]

Whenever I try to change the collision fidelity of my union so that player doesn’t float above the empty hole I get this error. I have no idea what it means for my scenario or how to fix it.
Here is my code

local newUnion = v:SubtractAsync(unionDelateTable)
newUnion.CollisionFidelity = Enum.CollisionFidelity.PreciseConvexDecomposition
newUnion.Parent = toSpawn

[7z99 (cody)]

You can’t set the collision fidelity of parts at runtime by indexing the part like that, you have to pass the CollisionFidelity as the second parameter of SubtractAsync (so v:SubtractAsync(unionDelateTable, Enum.CollisionFidelity.PreciseConvexDecomposition)

Optionally you can also pass a RenderFidelity as a third param