Updating apps with a different Apple ID
I have a new Apple ID on my iPad Pro, and want to update iWork apps. The only way you can do it is by deleting the existing app and DL new one from the App Store. My question: would I lose the existing data on my iWork apps? Or would it still be available in the new files app and can be restored to the new iWork app?
If that’s not possible, than how can it be done, considering even iCloud is also linked with one Apple ID at a time.
Thanks
iPad Pro 12.9-inch Wi-Fi, Cellular