ORA-16160
        cannot change protected standby database configuration
        
        
        Cause
        An attempt was made to change the standby database configuration when the primary database is in standby protected mode.
        Action
        Add the standby database to the configuration before opening the primary database.
        
     
    
    
        ORA-16160
        Cannot change protected standby database configuration
        
        
        Cause
        An attempt was made to change the standby database configuration when the primary database is in standby protected mode.
        Action
        The standby database must be added to the configuration before the primary database is opened.
        
     
    
    
        ORA-16160
        Cannot change protected standby database configuration
        
        
        Cause
        An attempt was made to change the standby database configuration when the primary database is in standby protected mode.
        Action
        The standby database must be added to the configuration before the primary database is opened.