iOS App Distribution Private to specific organizations on Apple Business Manager

I have created app on App Store Connect then selected Pricing and Availability there in bottom three options are available.

I need to deploy my app for an oraganization, also my application has frequent chnages.So need private distribution to specific organizations on Apple Business Manager without any App Review Process.

But as i checked below option need to be selected -- Available for private distribution to specific organizations on Apple Business Manager or Apple School Manager

In my case above option selection button is disable. Is there any information missing from my side please suggest the solution for the same.

Solution 1:

I read online the following, I hope it helps;

Source