It's easy to update the keys associated with your distributions.
Go To Your Distribution Report
From the left-hand navigation pane in your admin account, go to "Distributions."
Find Your Distribution
You can either scroll through your distributions or use the "Filter" bar to search for a distribution by name or keyword.
Options and Add Keys
Click on the "Options" drop-down menu and select "Add Keys."
Enter the amount of keys you would like to add to your total distribution. If your original distribution had 10 keys and you need a total of 15, enter 5 in this pop-up.
Check the Final Count
Once you've added your new keys, you can double-check the total keys in your distribution from the main distribution report.