What danger did washington evision when he wrote that if shays’ rebellion succeeded “it is not probable the mischiefs will terminate”?

When George Washington made this statement about Shay's Rebellion he was saying that it was good for the country that Shay's Rebellion was unsuccessful. This is because if Shay's Rebellion had been successful, others might hear of it and form they're own rebellions. Because Shay's Rebellion was unsuccessful, it prevented a lot of future rebellions from happening because people were able to see how wildly unsuccessful the first one was.