Spurious duplicate ISBN error > Likes and Comments

Hello, while checking the different editions of my books, i detected the following error in my book The Sacred Amulet (In Strange Orbits #7).

The error is as follows:
"librarian note for this book (last edited by Goodreads at Oct 03, 2023 05:56AM)
The ISBN 8415981422 for this book was also used by another book.The ISBN13 9788415981428 for this book was also used by another book."

Actually, the actual ISBN 13 for this book is 9791387843052, and is correctly registered in the corresponding book page.
I assume that the error is generated by the fact that the ISBN13 starts with 979 instead of 978, so the conversion to ISBN10 generates a wrong code which refers to a 978 book ISBN. ) 979-type ISBNs CANNOT be converted to ISBN10 codes.

The SAME issue appears for the book "New Earth" (In strange orbits book 27).
The correct ISBN is 979-13-87843-01-4.
Again, the error is probably due to the incorrect conversion of a 979-type ISBN into ISBN10

Ramon wrote: "The SAME issue appears for the book "New Earth" (In strange orbits book 27).
The correct ISBN is 979-13-87843-01-4.
Again, the error is probably due to the incorrect conversion of a 979-type ISBN i..."

Hi Ramon
I've looked at the librarian note for both books. For me, they are both done by the Amazon bots. They aren't visible to anyone but you, librarians & Support, so I wouldn't worry about them.

You say the first one says Goodreads. Like I say, I am seeing that it has been done by a bot. Could you link to the edition where you are seeing that?

Done.