Is a quit claim deed sufficient to transfer the home back to him?

I was awarded my marital home in my divorce decree. The decree specifies that my ex would sign a quitclaim after I obtained a mortgage in my name since I was never on the title or the deed for the home. Our divorce was very amicable. I have since decided to buy a different home. I am willing to give up all equity in the home and allow my ex to take it back. Even though I am not on the mortgage or deed and my only claim to the home is my decree, I signed and filed a quitclaim to release my interest in the home. It has been 16 months since our divorce and I think we are past the window of asking for modifications to the property agreement. Any advice is appreciated. Thank you.