Ah I'm sorry, I now see what you mean! Yes, it's working!
But.. unfortunately, I see I do not have the unlock option for the slices... Only for the graphs. I now only can do the opposite of what I want to do. Now I can lock the slices, so people are able to edit the graphs. I just want to do the opposite: let people be able to edit the slices, but not the graphs.

Do you know how to "unlock" the slices?