It is damage. It is only an error if it happens during the striking of the coin. Anything that happens after that is damage. Suggest that you study how coins are minted and then you would understand how something like that could not be an error. Also by knowing what actual errors are, it would help you in identifying what is and what is not an error.
Note most of the affected areas are the higher spots. So it was cranked down with a vise. A closer view would show metal splash from the deeper contact areas. (Displacement of metal caused after the strike, so it is not a mint error)
I didn't think I had images of this, but checked and I did!