Adding a new book/ ISBN already taken

[Open Road]

Hello,
I am trying to add a new English ebook edition of Nihal of the Land of the Wind by Licia Troisi, published by Open Road/Mondadori on 5/27/14. When I add the isbn ( 978-1-4804-1796-0), I get an error message that it is already taken by another title, The Venetian Ghetto. This is also a Mondadori title, so I see there is some confusion. How can I resolve this to get the edition of Nihal up on Goodreads?
thanks!
Amanda at Open Road

[Deon]

i didn't find the edition of Ventian Ghetto with that ISBN

I added Nihal of the Land of the Wind
https://www.goodreads.com/book/show/2...

[Open Road]

Thank you, Deon!