In said partition, the value of the presumptive legitimes of all common children, computed as of the date of the final judgment of the trial court, shall be delivered in cash, property or sound securities, unless the parties, by mutual agreement judicially approved, had already provided for such matters.
The children or their guardian or the trustee of their property may ask for the enforcement of the judgment.
The delivery of the presumptive legitimes herein prescribed shall in no way prejudice the ultimate successional rights of the children accruing upon the death of either of both of the parents; but the value of the properties already received under the decree of annulment or absolute nullity shall be considered as advances on their legitime. (n)