...
Copying and pasting the merge field and changing it to a different name does not work as it only changes the physical component of the merge field but not the actual command associated with it.
8. Once you've finalised completed the changes by adding the table and merge fields, save the template in your computer by clicking File → Save As and you might edit the file name to indicate it's an updated copy.
...
In this example we call it Progress Claim with Variations.
10. Click Upload a new Template and select the updated version that you've just saved and then click Save button.
...