Q: if somebody was following a mujtahid who is of the opinion that one can pray
with something obtained from an animal whose ritual slaughtering is doubtful and
he was praying according to such a fatwa. Then, he came to know that his taqlid
was void because the mujtahid was unqualified and, therefore, he changed to a
new mujtahid who forbids such a thing. What is the ruling of the prayers that he
offered following the wrong mujtahid with something whose slaughtering method
A: They are ruled as correct because he was unblamable regarding his ignorance.