Dynamics Error: Only owner can revoke access to the owner.

Error: Only owner can revoke access to the owner. CallerId: xxxxxx, OwnerId: yyyyyyy

I was getting this error when attempting to revoke access from yyyyyy via code on an account entity. What I found out was that while yyyyyy was the owner of the entity, I could successfully revoke access from the entity.

Instead, I first had to assign the entity to the new owner (xxxxxx) and only then could I revoke access from yyyyyy.