Switching Between Windows 11 Home OEM and Windows 11 Pro Without Deleting the OEM Partition – What Happens?

[Microsoft Windows]

I currently have a Windows 11 Home OEM installed on my device. I'm considering installing Windows 11 Pro but I want to do it without deleting the OEM partition. What are the potential consequences of doing this? Additionally, If I've already installed Windows 11 Pro and activated it with a new product key (non-OEM key) and want to switch back to Windows 11 Home using an official Microsoft image, will the OEM product key stored in the OEM partition still be valid for activating Windows 11 Home after the reinstall? Any insights or experiences would be greatly appreciated! Thanks!

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