If the property thus seized and sold is the same which was subject to the collation, the coheirs seizing, or their representatives, shall be paid the amount of their debt due for the collation, by privilege and in preference to all the creditors of the donee, even to those to whom he may have mortgaged the property for his own debts or engagements, previous to the opening of the succession, saving to these mortgage creditors their recourse against other property of the donee.