When you change the key, the value will become empty:
This is a small thing that just gives me more clicks and can take me out of flow.
I want to be able to change the value first and then the key, as this is apparently something I intuitively do every day.
EDIT: I see I've been bothered by this for a while: In database updater, value resets when changing key
So now it's in the form of a feature request, please vote