Trying to add an achievement to a user but I get an error saying the achievement has og:type of 'website'

Question

I've created and achievement: https://graph.facebook.com/10150491734196645 It seems to be correct and there it says it is an achievement... However when I try to add this achievement to an user i get the following error:

facebook.GraphAPIError: (#3502) Object at URL 10150491734196645 has og:type of 'website'. The property 'achievement' requires an object of og:type 'game.achievement'.

I don't know what I'm doing wrong here :/