Is praying for marriage to a non-Muslim person after their conversion to Islam considered a sin if that person committed certain sins before their conversion?

It is permissible for a woman to supplicate for a disbeliever's guidance and to marry him after his conversion to Islam. However, if he converts but insists on committing major sins like drinking alcohol, then marriage to him is not advisable. Marriage to one who abandons prayer or commits adultery is valid according to the majority of scholars, and one should pray for their sincere guidance. Their sins after embracing Islam are not to be borne by others, for "Every soul, for what it has earned, is retained."