Question about product key after windows inplace upgrade

Good morning,

 I have a windows server 2012R2 Standard license:
WINDOWS SERVER 2012R2STDROK2CPU / 2VM 
LENOVO

with related product key

System is ok and active, all goes fine.
I am now attempting to do an inplace upgrade to Windows 2019 server Standard, as the license should also be valid for this product.

The inplace upgrade process goes fine but at the end Windows 2019 server is not activated.

If I try to activate it, the PRODUCT KEY (of WIN SRV2012R2) is considered invalid:

I also tried with this command:

DISM /online /Set-Edition:ServerStandard /ProduckKey:XXXXXXXXX /AcceptEula

but I catch an error:

ERROR: 87 (invalid product key).

What I'm missing?

Is not possibile to do an inplace upgrade from 2012R2 to 2019 with ROK license?

Thank you...