Programmed Hyundai Key Fob Now Old Key Doesn’t Work Is That Normal? : Locksmith

I have a 2013 Hyunda Elantra. One of the original key fobs has a broken battery terminal and only works if I’m lucky. I bought an aftermarket key fob and took it and my broken key fob to the dealership. They programmed the new key, and my old key still works. When my wife tried to use her original key though, it no longer works. I would have thought they were just adding a key, not reprogramming the whole car. My question is if this is normal that you would have to program all the keys at the same time?

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