I personally would re-establish the bevel at 90 degrees to the shape that you want it to be and then regrind the bevel on a medium waterstone, or even faster, a medium india.
Whether you get to the bevel by continously chasing the one that's already there back, or you reshape the edge at 90 degrees and then redefine the bevel makes no difference as long as you know what you want and have the coordination to do it. I always breadknife frowns until i get the shape/line of the edge proper.