So you mean, they rewrite the canon or they ....fix it somehow later?

Like they fix it somehow. To give just one example, Stephanie has a lot of history (and issues) with being told that she is not good enough in general, and not necessary to The Batman in particular. Damian is Batman at this point, and it's made very clear that she is necessary to him. She saves his ass, he respects her as a hero, she doesn't hesitate to call him on his shit - basically, it's better that she's there.

And then the author does that for multiple strands of trauma on Stephanie's part.

Harley Quinn just has one scene, but it's a great scene.