With only six confirmations it's extremely hard (in practice impossible) to reverse, which happens in around an hour. Just wait a few hours, or even a day, and the risk is basically non-existent. There are a million other things to worry about at that point (including someone hitting you with a wrench until you send them money).

The transaction now has 572 confirmations. Nobody will ever reverse that.

You can't erase the bitcoins, just the transaction. If you did that, they'd still be in the source wallet.