Seems like mechanical damage maybe during your repot??
Try to dab some cinnamon on that spot. I would rather further allow that plant to dry off and callus that area. It is like an ugly wound, needs to dry out. If the upper leaves starts to fall off, and that depression spreads, then you may have to do hard pruning, to fully cut the damaged area, and then dab again some cinnamon and allow to heal the area.
