Feature Restricted license Isolated, how to replace challengekey??

Hi, i have used a wrong challengekey when creating an acrobat pro dc package and hence it uses up a license. I have a total of 5 licenses in the adobe admin console but now have 1 used license. I have deleted this package but it says i still only have 1 used license making me left with 4.

How can i change this package with another challenge key without using up a license? 

Note that i have not even used this package to install on the target enterprise laptop.