If you want to change how you've published your release in Single, or there are issues with a published digital album in Shopify, the quickest fix is to simply archive and republish the album from Single.
How to Archive a Digital Release
Go to Music > Digital Releases from the left sidebar.
Select the album and then click "Published" in the "Status" dropdown.
Select Archived, then "Archive Release
Note: Archiving a release will remove any associated album products from your store. Attachments will also need to be recreated if you republish.
How to Republish a Digital Release
Using the same dropdown mentioned above, change the status to "Published"