Composite model: update model after table name changing

Hi Francesco!

I have the exact same problem, but I found a solution, that is not great, but it working. 

Here is my architecture:

- 1 golden dataset

- 1 composite model dataset that uses to golden dataset + a Onedrive excel file

- 1 report that is made from the composite model (directly on the same file as the dataset).

What changed:

>I changed the name of 2 columns in the golden dataset (and added another one)

What wasn't working:

On Desktop when I try to update the composite model, I get an error, saying there is not "old column name" in the golden dataset. I believe however that the data on the report on PBI Service was still updated (not sure cause I have another issue on the golden dataset).

How I fixed it:

I've seen that I can rename the columns in the composite model (right click ; rename).

So I renamed both columns with the new name from the golden dataset. 

The composite model can now be updated. 

I've noticed that the new column now appeared as well. 

>My solution is not great because in case you'd make heavy changes to the golden dataset, the data doesn't follow up. 

other solution ; I had tried to delete the tables that are from the golden dataset to then add again the golden dataset as a source. The problem is that once you delete the tables, Desktop asks you to apply the changes, but it won't work as it cannot find the data.