Short answer. Yes. Article 1612 extends the rule for joint sellers to this exact situation: when a sole seller who sold with a right of repurchase has left several heirs, each heir may only redeem the part which he may have acquired, not the whole property on his own.
What the law says
The same rule shall apply if the person who sold an immovable alone has left several heirs, in which case each of the latter may only redeem the part which he may have acquired.
Civil Code, Article 1612 — Joint Sellers' Redemption Limited to Their Share. Read the full provision →
What the law says
If several persons, jointly and in the same contract, should sell an undivided immovable with a right of repurchase, none of them may exercise this right for more than his respective share.
Civil Code, Article 1612 — Joint Sellers' Redemption Limited to Their Share. Read the full provision →
The rule extends from joint sellers to a sole seller's heirs
Article 1612 begins with joint sellers and then extends the same limitation to your exact scenario: the same rule shall apply if the person who sold an immovable alone has left several heirs, in which case each of the latter may only redeem the part which he may have acquired. Even though the property was originally sold by a single person, once that person dies leaving multiple heirs, each of them steps into a position similar to a joint seller, limited to redeeming only the portion that passed to them through inheritance.
Where this rule comes from originally
The article's starting point explains the logic being extended to your situation: if several persons, jointly and in the same contract, should sell an undivided immovable with a right of repurchase, none of them may exercise this right for more than his respective share. The principle is that redemption tracks ownership share. Someone who only ever held or inherited a fraction of the interest in the property should not be able to redeem the whole of it unilaterally, leaving the other co-owners or co-heirs out of a decision that affects their own shares.
What this means for you as one of several heirs
If you are one of several heirs of the original seller, you may exercise the right of repurchase, but only as to the portion of the property that you personally acquired through inheritance. You cannot redeem the entire property on behalf of all the heirs without their participation or consent, and none of your co-heirs can redeem your share on your behalf either. Each heir's redemption right is confined to what they individually stand to inherit from the original seller's interest in the property.
Coordinating with your co-heirs
Because each heir is limited to their own share, redeeming the entire property back from the buyer will typically require the heirs to act together, even though the law does not force any single heir to redeem more than his own portion. If some heirs wish to redeem and others do not, the practical result may be a partial redemption, with the buyer retaining an interest corresponding to the shares that were not redeemed. Sorting out how the heirs coordinate, or whether they choose to redeem individually, jointly, or not at all, is a decision the law leaves to them rather than dictating for them.