When an ISBN is re-used

[Elizabeth (Alaska)]

What is the policy when an ISBN is reused for an entirely different book? Do we delete the ISBN and add a librarian note? Can we cross-reference the books in the description so that people who search by ISBN can find the title they actually want?

I just tripped across 3 Lithuanian titles that have reused the ISBN:

https://www.goodreads.com/book/show/2... (this one has the ISBN10 in the ISBN13 position and is how I found this snarl. I have left it in the ISBN13 position (incorrect I'm sure), until I know how to proceed.

https://www.goodreads.com/book/show/2... (this has the ISBN13 which corresponds to the ISBN for the title above)

https://www.goodreads.com/book/show/2... (this has the ISBN10 in the correct field)

[Arenda]

The same as for alternate cover editions.
The first book that is added to Goodreads keeps the isbn. The other(s) can have the isbn in the description and librarian note. And links to the other books in the description are really nice.

[Elizabeth (Alaska)]

Thanks, Arenda!