RMS record stores can only be accessed by the MIDlet from which they were created. When an application is upgraded, the data remains accessible to the application. To be considered an upgrade, the application must have the same MIDlet-Name and MIDlet-Vendor. The MIDlet-Version can be different.
If the MIDlet-Name and MIDlet-Vendor change, later versions of the application will not be able to access the RMS Record stores created by earlier versions of the application.