Should one make up for missed prayers that have not yet been made up for?

Whoever has been negligent in prayer must offer sincere repentance, seek forgiveness, feel remorse, and resolve not to return to abandoning it. He must also immediately make up the prayers he missed, because death comes suddenly, and prayer is the first thing a servant will be held accountable for on the Day of Judgment. If it is complete, it will be accepted and the rest of his deeds will be considered. If it is not complete, it will be supplemented by voluntary prayers. If it is not accepted, his deeds will not be considered.