The bad news is it appears the paint is letting go from the primer, and that can't be helped. The good news it can be "fixed", atleast for a while. Get some touch up paint on that area, and make sure it seals the area between the edge of the peeling paint and the primer, so moisture can't get under it, then keep an eye on it, and touch up the paint if it starts to spread. You may be able to keep the peeling from getting worse for many years.