Cannot save cube with Coord as dim

[TabeaW]

Is it right that it is not possible to save a cube with a dimension of Type Coord, yet? Either MethodError: no method matching defaultfillval(::Type{Tuple{ Float64, Float64}}) or when overwriting YAXArrayBase.defaultfillval(T::Type{Tuple{,Float64,Float64}})=(1e32,1e32) DirectoryStore("cube.zarr") is not empty is my problem.