Hello! I recently harvested my sweet potatoes, because the leaves were wilting and turning yellow. The haul was meager (it's a damn good thing my family isn't depending on my garden to feed them!), and of course, I had an issue with my four best, biggest potatoes. All four were sticking out of the ground about 2 or 3 inches (see attached photo). I seem to remember that prolonged exposure to the sun can cause them to go bad and even be poisonous? Is that correct? As you can see in the picture, there is a slight discoloration on each potato, ranging from just a paler orange, to slightly gray-greenish. Are these safe to eat if I cut off that portion? If so, is it OK to cut off that part before I cure them? Will it heal over? If not, can I save them for making slips next year? Will curing them (80 degrees and high humidity for 7-10 days) have an impact on whether they work for slips or not? Thanks! Mike