SCCM: In Place upgrade Win 7to win 10 1903 License issue

I was working on one task sequence for In Place Upgrade. Win 10 1709 to Win 10 1903 is working fine.

But Win 7 to Win 10 1903 is getting failed during Upgrade Operating System step.

I checked some of the links and added the KMS Client Keys (NPPR9-FWDCX-D2C8J-H872K-2YT43) in upgrade operating system step.

Also added one step to run vbs script.

Cscript.exe c:\windows\system32\slmgr.vbs /ipk NPPR9-FWDCX-D2C8J-H872K-2YT43

But Task Sequence is getting failed at this step.

Error: 0xC004F050 The Software Licensing Service reported that the product key is invalid

Command line Cscript.exe c:\windows\system32\slmgr.vbs /ipk NPPR9-FWDCX-D2C8J-H872K-2YT43 returned 3221549136

In my environment, we are using KMS and we don't have a Volume license.

Any advise how to resolve this issue.

Microsoft article KMS client setup keys lists this serial key as:

Windows 10 Enterprise   NPPR9-FWDCX-D2C8J-H872K-2YT43

This key might not be suitable for your Windows 7 version.

You might either use another and more appropriate key from the list.

You could also use Microsoft's Media Creation Tool, which can be run in Windows 7 to automatically choose the best Windows version to upgrade to.