It means they are cheating. Just report them to WGT to be honest. No way an actual new player can score that good. It means they have multiple accounts and have started over to steal the money from the actual new players.
I experienced the same when I was Hack and Amateur. No chance in the tournaments because "new" players spanked us by 10+ shots a round, often scoring in the low-60s. I don't care how many golf games a player has played in his life - that is impossible.