[JDCam]

As part of a recent renovation, I have added/relocated a light with 3-way switches. I am pretty sure I have the wiring correct (drawing attached), but the breaker keeps popping as soon as I turn it on.

Source > Switch1 > light > Switch2

note: the source and switch1 were previously operating a different fixture. I cut the 3 way wire and added the light and switch2 into a new location.
In the drawing, switch1 is only based on what I see from removing the outlet, it is wired from the original builder.

what have I done wrong, why does the breaker pop?