Some people say that one must follow what the church teaches, and others say that one must follow one's conscience, even if it differs from the church.
Conscience is a guide to good moral behavior.
Beyond that, the individual is bound to form or educate his own conscience rightly. It is possible to have a badly formed or erroneous conscience. Such a conscience is not a guide to good moral behavior. Quite the opposite. Conscience must be informed and moral judgment enlightened.