Doug;...quite right!..original hebrew psalm 89.6:...who among the sons of EL..is like yahweh.
The top dog Canaanite god El had sub gods even godesses, one of whom was yahweh.
The Israelites liked the attributes associated with this sub god and decided to make him their only god.
Hence the use of Elyon(god most high)came to be seen as yahweh , but in truth it was really a hijacking of the canaanite god El.
Many passages in the O.T. show that polytheism was not totally eradicated in the early Israelite culture.
Best wishes