My take is that when you discard a card for any reason, it is not necessarily still equipped in that slot . It remains on the table, facedown. Nothing more.
I do not presume to say you are wrong, Gadgetron. But I still think that it is ambiguous. Yet the word “discard” has a decently-defined meaning in game, and I think it is presumptuous to ignore that because of a lack of clarity in a non-game term (“replace”).
Cheers!
Edited by RobertK