To republish an app that has been published from the QMC, you must create a duplicate of the app.
If you publish an app from the hub, the app in the owner's Work folder will get a stream icon to indicate that it has been published. If you want to publish the app again, you must first make a duplicate of the published app.
Do the following:
Open the QMC: https://<QPS server name>/qmc
Select Apps on the QMC start page or from the Start drop-down menu to display the overview.
Select the published app you want to republish and click Duplicate in the action bar.
A duplicate of the app is added to the overview.
The duplicated app can now be edited and published. Use the option Replace existing app to replace a published app.