What is the duty of a person whose recitation in Salaat has been incorrect for years? The Grand Ayatollah Shobairi’s answer

The Grand Ayatollah Shobairi Zanjani answered a question about Salaat/Salaah.

Question: What is the duty of a person whose recitation in Salaat has been incorrect for years?

The Grand Ayatollah Shobairi: If the person had considered it to be correct, and then realised it was incorrect, it is not necessary to perform Qadha Salaats.