Windows 10: Windows 11 Home Single Language to Pro activation error msg 0x80070057

I've wanted to upgrade my Windows 11 Home Home Single Language to Pro version, but when I press Start after entering activation key that I bought I get this message;

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how to downgrade windows 11 pro to windows 11 home single language?

I have installed windows 11 pro (i.e. not genuine) which is not activating as I have digital licence for windows 11 home single language edition and troubleshooter says that i will have to go back to home single language edition to activate windows. so, how can I downgrade windows 11 pro to my previous genuine windows 11 home single language edition?

 

Go to Windows 11 Home Single Language

I'm Upgrade to windows 11 Pro but not activate and I have digital licensing Windows 11 home single language. Can't my PC go to Windows 11 Home single language?

 

How to properly upgrade windows 11 Home single language edition to windows 11 pro and activate it?

I have bought a Laptop with pre-installed windows 11 Home single language (digital license) edition (activated).

I want to upgrade it into windows 11 pro then I buy from Microsoft Partners Authorized, and I got win 11 pro product key.

I change product key using it, then it tell me that windows need to be restarted to upgrade to windows 11 pro. After restart, status of windows is Windows 11 Pro, but not activated.

Please help.