If you need to change the metadata of broadcasts after the initial upload you can do that manually. Please follow these steps: 

  1. Go to the metadata section in the Magine Pro Console 
  2. Find the broadcast in the list and select it
  3. Change the items you need to change and click on save
  4. Then go to the Exports section and trigger an EPG export for the channel the broadcast belongs to.

The change is immediate and can be reversed in the same way.