Add keyframe animation to existing

how to add a keyframe animation without changing the first animation?

The first frame must also have a keyframe so that Blender knows what the starting value is for the animation. Otherwise it assumes the first keyframe you add is the start point of the animation rather than what you probably meant (the end point).

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parenting the armature to a empty helps. I’ve values going from 355 - 5 from msfs2020. How to deal with those? 360 should be centered. thanks