Just to be clear, this won't be fixed today for sure.
I will see if I can bring back the ability to edit future contracts for transfers that are not confirmed yet.
Anyway, this should not be a big issue since you can edit the Future Contract as soon as the transfer gets confirmed, or when the player arrives to the new club
What you've shown is ONLY for future agreed transfers tho.
I'm still unable to edit ongoing contract negotiations for a player being bought or sold.
Case in point, TFM being sold; cannot edit contract details when Woflsburg have already offered him one.