Why do we say, Mary Mother of Our Creator?

[otjm]

Hello. I don’t know where to post this but since I encountered this title in a traditional prayer, The Litany of the Blessed Virgin Mary, I decided to post it here. Isn’t this title heretical? I thought that the Father was the Creator but Mary bore the Son. So, she can’t possibly bear her creator, right?

John 1, 1 “In the beginning was the Word, and the Word was with God, and the Word was God. He was in the beginning with God. All things were made through Him, and without Him was made nothing that has been made.”