Information about friendship and affection in PKHeX

[Atmosphaera]

Hi in PKHeX there is friendiship and affection in section "memory". Friendship refer to this https://bulbapedia.bulbagarden.net/wiki/Friendship

and affection refer to this https://bulbapedia.bulbagarden.net/wiki/Affection 

is CORRECT?

If yes why for a pokemon (ex. swampert from 3rd gen) with cutenees ribon on sav 7th gen. I have error if i put 255 in friendship and 0 in affection. If i put 0 in friendship and 255 in affection i NOT have error. But If the answer at question i make UP is YES... affection is a mechanic introduced on gen. 6 so why i have error with 255 friendship and correct with 255 affection?

I hope i was clear. Thanks in advance

[Kaphotics]

Winning a Gen6 Contest grants 20 affection each time you complete it. Having the ribbon means you have to have affection.