What they are saying is that it is not a mint error, but rather, someone has taken a perfectly normal penny and machined it to make it look like that. Why someone would do that, we can't tell; I would assume that someone was using it to make some kind of trenchart-style piece of art, or perhaps some kind of
Magician's coin.
Alas, as a "damaged coin", it is not of interest to collectors.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis