The building and the word one has been rotated and restamped. The best glue ever! In circulation and the glue is still there.
It looks recessed in which case someone did a hammer job on it post mint. They took another cent, and placed the reverse sides together, off set, and then hammered it to imprint it like that. It's post mint damage.
Seeing how E pluribus unum and other details of the reverse appear intact, I don't think the culprit is a hammer job. To my eyes it appears to be a leftover glue or epoxy that was stuck to two coins, and when 1 coin was removed, it left the design on the other. The OP even mentions glue in the original post. At any rate it is post mint damage and not an error.