A judge could rule Weisselberg violated the deal because jurors, by their verdict, found he lied.
He has been promised a five-month jail sentence as part of his August plea deal.
But that deal required Weisselberg, 75, to testify truthfully against former President Donald Trump's real-estate company, where he's worked since the 1970s.
"Weisselberg says over and over, 'I, together with the Trump Organization,'" Florence, now in private practice, noted of his guilty plea.
Trump Organization lawyers have already promised to appeal the verdict itself.