Hi,
We are trying to update the Project OwnerID value using the below flow:

FormDigestValue is extracted by parsing the body of:

@body('Parse_JSON_2')?['d']?['GetContextWebInformation']?['FormDigestValue']
And Outputs is the ID of the SharePoint user converted to string:
string(body('Get_ID')['d']['id'])
According StackOverflow: How Do I Change The Project Owner Using REST API all looks good, the result is:

But Owner is not updated and 22 is the correct UserID in SharePoint/Project Online we need to be the Project Owner.
Does anyone could please indicate what is missing?
Thanks in advance!