Does it count as a sin to discover that your prayers for the last many months were not valid due to impurity? Does the sin go away by making up the prayers after Ghusl?

SinGhuslSalah (Prayers)Najasa (Impurity)
Does it count as a sin to discover that your prayers for the last many months were not valid due to impurity? Does the sin go away by making up the prayers after Ghusl?
Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 5 years ago

As you did not know that your ritual purity was not valid when you performed your prayers, there is no sin on you if you had a valid reason of not knowing,  but you need to redo those invalid prayers. After performing those prayers,no your responsibility will be clear.

'Wassalam.