This is not something that is generally advisable, but as we see time and time again in films, people will not learn.
This approach went very badly for both Henrietta (Duck-Face) in 'Four Weddings and a Funeral' and the beloved notorious second chancer 'Bridget Jones'.
However, it seemed to be a success for Brenda in 'The First Wives Club', proving there is no hard and fast rule for this one.
Sometimes it needs a chance at going back to be able to fully move forward, but in most cases the advice is, don't!