Added new cover image but received error message

[P.S.]

Hi, I followed the instructions for adding an alternative cover to Luminary. The photo seemed to upload correctly, but when I went back to the book page, I got the following message: "Sorry, this book could not be set as the work's primary edition."

Unsure what this means since the book has an ASIN: B00XUJKT6S and am just trying to update the cover which was changed about two years ago on Amazon.

https://www.amazon.com/dp/B00XUJKT6S

If you need me to reload the photo, please let me know. It's the correct size and 300dpi.
Thanks,
Page

[Scott]

I don't know what the error was about, but it has a cover.