The Database Principal Owns A Schema In The Database, And Cannot Be Dropped.

Trying to get my hands around all the new security features of SQL Server 2005. In Management Studio did something I don't know how to undo. I added a database role ReadOnlyRole and clicked the box next to db_datareader in the owned schemas box. Then I tried to remove the ReadOnlyRole and could not. How do I undo what I did? Is it possible?

The below is the TSQL that generates the my issue.



Use [master]
go
create database [test]
go

USE [test]
GO

CREATE ROLE [ReadOnlyRole]
GO

USE [test]
GO

ALTER AUTHORIZATION ON SCHEMA::[db_datareader] TO [ReadOnlyRole]
GO

drop role [ReadOnlyRole]
go