App distribution

Hello, My company have Apple Developer Organization Program, and we have published apps to App store before. Now we want to distribute an app internal employee only. We submit app to App store and got rejected like below:

"Guideline 3.2 - Business

We found in our review that your app is intended to be used by a specific business or organization, including partners, clients, or employees, but you've selected public distribution on the App Store in App Store Connect. Since the App Store is intended for apps with a public audience, we recommend reviewing the other distribution options available to you through your Apple Developer Program Account. "

We looked for other distribution method and found the In-house distribution method that required Enterprise Program matched us. But unfortunately, when we register for Enterprise Program, we got reject too, with reason: "We've withdrawn this enrollment because "mycompanyname" is already a member of the Apple Developer Program. Companies may hold only one membership in the Apple Developer Program."

Have any one met this situation before? I really appreciate any idea.