The option to "Make a version unavailable for download" is broken

Need help as the the option to "make a version unavailable for download" is broken.

1- Go to the app store and select your app

2- On the left menu scroll down and click on "pricing and availability"

3- Scroll to the bottom to "Edit your last-compatible version for iOS apps" and expand the section

4- Click on the app versions

5- On the new pop-up window un-check the boxes for the versions you need to remove and click done. HERE IT IS BROKEN.

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This has finally been fixed by Apple.