I’m not getting the picture so I’ll just take a guess. 2 5/16th ball? 2″ receiver? Go buy a SOLID shank hitch. Only other thing you could do is weld the hole shut and redrill it.
Lol, I just went out with some sandpaper and verified that you are correct.
Funny, I asked the kid when I bought it if anyone steels these brass hitches and he looked at me Funny and said “every once and a while”