A while back, I had given an old phone to my wife when I upgraded. Recently, I upgraded again, doing the same. This time, though, after the phone was factory reset and her info put in, we noticed that she was getting a lot of pictures, videos, files and other such things that I had sent or recieved over the years. We figured out that somehow, her google account had become merged with one of my old google accounts. Is there any way to fix this?