Copy animation keyframes of rotation bone in 3ds Max

I have rigged character with root bone and child bone “pelvis”. I want to copy animation rotation keyframes from root to “pelvis”. I select all rotation keyframes of root bone, copy and paste in “pelvis”. Unfortunately my character is rotating in wrong direction and his behaviour is very strange. What can I do to work this properly?
I’m doing this to work with Root Motion because Unreal unfortunately doesn’t support rotation in root bone with Root Motion enabled.

Thanks for your help.