Hey!
They're similar questions, but not exactly the same (depending on how your university works out your overall degree classification). The first is your average across all modules you've taken, while the second is your final degree percentage (which might exclude first-year marks if they didn't count).
As you've graduated, you can just enter your final percentage for the second, and for the first, you could use your overall average including all years. If these are the same, that is perfectly fine too!