This question is a big but avoidable trap. You can avoid it by being prepared for it and having an example. Again. The STAR method is your friend and the key here is to be able to demonstrate that you managed the conflict to a point where you were at least able to have a good ongoing working relationship with your colleague.

Its important to not only describe the situation and the conflict. But also take the panel through the steps you took in terms of your communication and collaboration to work with your colleague on the conflict and how you showed respect to them.