La. Civ. Code art. 1729
Current with operative changes from the 2024 Third Special Legislative Session
If the partition, whether inter vivos or by testament, be not made amongst all the children living at the time of the decease and the descendants of those predeceased, the partition shall be null and void for the whole; the child or descendant who had no part in it, may require a new partition in legal form.
La. C.C. § 1729