When Initializing a session to a device that already has a session open, NI-DCPower closes the previous session and returns a new one. Since the Close VI was not called, the previous session remains registered in LabVIEW.
Below shows a way to get all the initialized session and close them to prevent multiple session remain unregistered. Please refer to screenshot below for further reference. The code should be placed before the Initialization to make sure all the sessions are closed before a new initialization is called.
