Cannot edit relationship

I had this problem today. Trying to delete a 1 to many relationship, it would briefly think about it, and then nothing, relationship persists. Through trial and error, by attempting to delete several relationships at once through the Manage Relationships dialog, I was able to learn that a Circular Dependency between two calculated columns within the table on the one side of the relationship I wanted to remove was preventing its deletion. I removed the calculated columns and boom! I could then delete the relationship.