Yeah, it’s no longer cannon to Undertale yellow. And the main reason is being due to individuality. I don’t want to write one story only for a fangame only for it to led up to another fangame and to have that fangame lead up to the main thing(fangame-ception if you will ). And this isn’t a jab to Undertale yellow or anyone else that tries to connect it to Undertale yellow. I just want this story to follow after itself and not try and walk on eggshells to make it add up to both games. Don’t worry, the story isn’t changing at all, It just won’t take place in Undertale yellow.