Try deleting the second keyframe? https://docs.blender.org/manual/en/latest/animation/keyframes/editing.html
Having trouble finding info on the keyframes, hmmm.
Edit: So I'm testing it in Blender, that window you have open on the left allows you to delete stuff. Find the one connected to him with the chillin' pose, click on it, go to Key dropdown menu right under the window (next to Dope Sheet), and then select Delete Keyframes and it should take care of it. You may need to do a lot of digging.