YHWH is the name of the only true God, he created all through Christ his spirit son.
And they heard the sound of the LORD God walking in the garden in the cool of the day, and Adam and his wife hid themselves from the presence of the LORD God among the trees of the garden. (Genesis 3:8)
The word "LORD" is from the tetragrammaton YHVH and means self-existent (life inherent, immortal).
It was not the Most High that walked and talked in the garden, it was the self-existent YHVH.