Seeing how the club like to use the media, I would guess that the precise wording is simply another way of confirming any current offers are no longer negotiable.
I bet the haggling will be over doing this as a transfer rather than activating the release clause. The release clause has to be paid by the player himself (although Albion would transfer this money as part of a contract) and this is subject to a big tax hit. Leganes will want something in...