An Independent Software Vendor (ISV) has developed and distributed a private application to multiple customers. They are now in the process of distributing the application to an additional customer, but they are unable to. What could be causing this?

The correct answer is that the ISV has hit the limit of 1000 customers using one private app. Google Play Private Apps have a distribution limit of 1000 organizations (customers) per private application. Once this limit is reached, the app cannot be distributed to additional organizations without creating a new private app for further distribution. The other options are incorrect because there is no requirement for a majority of devices to be running the latest version of the app for further distribution, nor is the customer limit 75.