(a) A motion to correct a clerical error in a judgment or to set aside and vacate a judgment on the ground of an incorrect or erroneous legal basis for the decision may be made as follows:
(1) By the court on its own motion at any time.
(2) By a party within 30 days after the clerk mails notice of entry of judgment to the parties.
(b) Each party may file only one motion to correct a clerical error or to set aside and vacate the judgment on the ground of an incorrect or erroneous legal basis for the decision.