I hope someone more scientific answers this for you, but my understand is you don't want to grow potatoes, tomatoes, peppers, eggplants, or root veggies for at least 2 years after potatoes in the same soil. The reason being potatoes deplete the soil of a lot of nutrients, and even if they look healthy they can still harbor disease, and or pests. You could grow peas beans, or some leafy greens, they should do fine. If this doesn't work I would throw it into the
compost. If you see disease, which I hope you wont that gets a little more controversial. I have read By hot composting, pests and diseases will be killed off by heat and microorganisms. Not everyone agrees with this, so it is something you will need to decide. I personally don't put anything I think has disease in my compost because I have a devil of a time getting mine to heat up. So I don't and if it doesn't heat, who cares, it still brakes down, it just takes a little longer. What ever you decide to do, I wouldn't throw it out. When it comes to gardening I say just do it. What is the worst that could happen? Maybe you waist a little money on plants, or seeds and don't get veggies, odds are you will still gain some valuable knowledge that will serve you in the future. Good luck growing your potatoes, and have fun gardening.