How do I motion to alter conditions of my deferred adjudication?

I was recently placed on 4 years deferred adjudication for a third degree felony. One of the conditions of the probation is that I can’t have any contact with my girlfriend or her family. She has expressed to the prosecutors and courts she doesn’t want this in place but they keep telling her that I have to motion to remove that stipulation. I live in Williamson county texas, and am wondering how I would go about doing this and or what forms I would need to do so.