"Copy of X" cannot be renamed X even if X was renamed.

[Zergla]

I had a card, thought of a better execution of it, so I copied it, renamed the copy "card 2.0", edited the card.
Found "card 2.0" silly so I renamed the original "old card" and tried to rename "card 2.0" to "card" but it isn't possible (there's an error message).