如何使用另一个Apple ID将已经在线的iOS应用程序提交到App Store？

My company had outsourced an iOS app to another company, and they published the app on the App Store using their Apple ID. The app have been available for download for a few months and has a number of users. Now my company developed a slightly newer version of the app and would like to distribute the app using our own Apple ID. What's the correct way to do it? The major concerns we have are:My company had outsourced an iOS app to another