Data Flow Views are offline entities in the Performer Suite. This means that if a Data Flow in the SAP system changes (e. g. a new branch is added), the DFV in the Performer Suite does not change automatically. Because the DFV is a preselected and defined subset of a complete Data Flow. 
If something like this happens and you have to change your DFVs, you have to open the online Data Flow in the Data Flow display section and create a new DFV. You can also overwrite an old DFV by saving another one with the same name.