Should a wife repeat her prayers after discovering that what came out of her was semen (maniyy) and not pre-ejaculatory fluid (madhiy), and that she had not performed ghusl for janabah for an unknown period of time?

"Ghusl (ritual bath) from Janabah (state of ritual impurity) is a condition for the validity of prayer. Whoever prays without ghusl, their prayer is invalid. However, an ignorant person is not sinful. Scholars have differed regarding the obligation to repeat prayers performed without purification in this situation. Most of them have made it obligatory to make up these prayers. Ibn Taymiyyah, however, held the view that whoever neglects a condition or pillar out of ignorance is not obliged to repeat past prayers. Rather, they should repeat the current prayer and maintain it in the future, citing as evidence that the Prophet (peace be upon him) did not order the Bedouin who prayed incorrectly, the woman with prolonged bleeding, or Ammar to repeat their past prayers. This latter opinion is strong. If the wife wishes to be cautious, she may make up what she believes will clear her conscience."