You haven't got all the rights when it's a GD because you're not the mapper.If Priti doesn't want the diff in his mapset he doesn't need to implement it, it's simple as that.
It's totally disrespectful to delete someone's work since he worked for you, and that's what you've got in return.
It's his work and he can completely decide by himself if he wants it there or not, so please don't start any war here.
Also I will mod this later.
However. If a GD is not taken at least you could give him a KDS, that's how it is normally handled, I think. => I am not really sure about that anyway, better ask a BAT before.)