There's nothing there about vacating one, but there's nothing there PROHIBITING the vacating one, either. What you'll need to find is either a statute of court precedent that deals specifically with the vacating of a judgment in general.
What does your ex say about submitting such a motion? Will she agree to do it with you voluntarily?
What does your ex say about submitting such a motion? Will she agree to do it with you voluntarily?