Ugly,
You and I know it's a slip of the pen, but to an insurer it's a get-out-of-jail-free card.
Imagine youself in court. What would you say when a be-wigged, silk robed person says words to the effect of "would you care to tell the court why you commenced a flight in this aircraft when you knew that the maintenance release was out of date by a year?"
You'd need a good story!