So the compromise itself is within ethics rather than between competing ethics, and I think that's true in geo-political concerns.
So I think ethics is the broader thing that's less focused on prohibitions and is more perhaps looking at principles and questions and ideas about how to live your life.
We see things like reciprocity which are fairly central to our view of ethics. But if you're talking about a set of worked-out rules on what we are supposed to do then, yes, it is a human product.
I don't think there's anything in the compromise that means that there's a clash of ethics.
More often there's a compromise between ethics and expediency.
Ethics seems a morass which we have to cross, but get hopelessly bogged in when we make the attempt.
The principles of ethics come from our own nature as social, reasoning beings.
Ethics is inescapable.