Must past prayers that were performed after the emission of madhy without washing the entire male organ and testicles be redone, based on a change in fatwa from not necessitating their washing to necessitating it?

It becomes clear that what is obligatory in purifying madhy (prostatic fluid) is washing only the contaminated area, while washing the penis and testicles is a recommended act according to the most authoritative opinion. What you previously practiced is the most authoritative opinion, and you are not required to repeat the prayers.