When you have an enriched feed that is already being used in an output feed, then you are able to make updates to the images that are being used in that catalog without creating a new enriched feed design.
The updates to the design will take place on your next scheduled sync. To update the design sooner, you can publish updates immediately after editing the design.
Editing a feed design
From the Feeds section, select the design that you would like to update.
From the AdBuilder, make edits to existing layers, add new layers, or remove existing ones.
Preview the changes across relevant products by clicking the Preview button
Once you are happy with the changes select Publish Updates.
You will then be redirected to the output feed that this design is linked to.
From the output feed page, first make any additional edits necessary for the other designs in the feed. Once you're ready to commit the changes, click Publish Updates to render the new changes into your Feed URL.