PL/SQL :: Renaming View From Another Schema?

I've 2 schemas  namely  department,  hrNow department schema is having one table EMP . And a view is created on that table with the name R_EMPSchema Name : 

departmentTable Name  :  EMPView Name   :  R_EMPGRANT SELECT ON R_EMP  TO  HR ;  In HR schema a synonym has been created on view R_EMP with the name R_EMP .CREATE OR REPLACE SYNONYM hr.R_EMP for department.R_EMPSchema Name :  hr Synonym Name:  R_EMP

Now I want to rename the view name R_EMP  to V_EMP  from  HR schema only So, I tried the folloiwng syntax in HR schema (All the operations should be done from this schema only )[code] RENAME department.R_EMP to department.V_EMP ;

Error: ORA-01765: specifying table's owner name is not allowed[/code] How to change the syntax to make the statement work from HR schema .