Hi,
I think you should set the order of Use grid-area Without Creating an Areas Template(Grid-area) and Divide the Grid Into an Area Template(Grid-template) in this order in RWD courses [CSS Grid].
The Grid-area course does not make any sense without using grid-area property and you won’t see any difference thus Grid-template course should precede Grid-area where final code from Grid-template should be use as starting point.