Imagine a long running franchise has a videogame with narrative choices, which result in different endings to its story, sidequests and some characters.
The IP-holder then makes a continuation, but in a linear format (book, comic, movie). They want a popular character from the previous game to appear in it, so the game is declared canon. However, the characters has a sidequest, which affects their fate big time.
What should the IP-holder do?