can't really see it. what do you think is an error on it? I just see a worn 1937 cent; which is 82 years old. also, turn off the flash on your phone, and use a room that is well lit when you take images. and don't forget to crop the image as above shows, and take an image of the front and back all the time.
Just use your imagine. I saw Lincoln looking both ways as soon as I saw the photo. It's just a stain but neat looking. Welcome to CT.