Can't change FD on Terrain model even in the actually designfile.

Hi,

I have recently updated my ORD to 2021 R2 update 10.10.21.04.

Earlier on, I believe I could create a terrain by element and go to the explorer to change FD to another one?

Like this:

and then go to properties and change FD but now it is locked!

OR - as fare as I recall - I could go to the 2d model and get the properties here and then change the FD but now it is reading it as if it was in a referencefile and I can only override with an ET:

But then when I go to my 3d model, catch the actually terrain and - only from here - change the FD:

I think I would like to be able to do the same through the Explorer if many terrains are present for example

But does this work as designed and why? :-)

Thanks

Regards,

Signe