Because the assignment of connections and resources occurs after applications, identities, and devices are paired, then reregistration is required when this association breaks or requires a different pairing.
Reregistration is required, for example, if an application user loses a device, or when devices are shared among multiple users.
Not all applications support reregisteration. To determine if the client application supports reregistration, confirm that the value in the Application Supports Client Callable Components connection property on the Capabilities tab is set to True.
See Registering or Reregistering Application Connections in SAP Control Center for SAP Mobile Platform.