Oracle Message ORA-12425 - cannot apply policies or set authorizations for system schemas

ERRORcannot apply policies or set authorizations for system schemas
CAUSEYou tried to either apply a policy to the SYS, SYSTEM, or LBACSYS schema or to set user labels/privileges for the SYS, SYSTEM, or LBACSYS user.
ACTIONApply policies and set authorizations only for non-system users.