Phantom duplicate ISBN

I added the new edition of Master and Commander by Patrick O'Brian (ISBN: 9780393541588) to my library. The system says I have a duplicate ISBN in my catalog, but I do not. I have the older Norton paperback edition from the 1990's, but that's all, and it is ISBN: 0393307050. While this doesn't appear to have impacted my library, I often have stacks of books around awaiting entry into LT (and then shelving), but I sometimes go days or weeks between entries (and shelving, lol), and I rely upon the duplication notification to tell me if I've already entered the book, so it would be nice to be sure this is accurate.

Thanks for your help.

I don't think it has to do with the ISBN that it is finding as a duplicate.
It's that you have more than one copy of the same WORK in your library.

Since you have two different printings of the Master and Commander, which are seen as the same work here, even if two different books, the system is telling you that you have a duplicate.

That's working as it should.

Unless you're saying there is a significant difference in the text between the 1990 printing and the newest printing, such that it's a completely different story?

>3 gilroy: I enter all my books by ISBN, when possible, which is what I did here. If I've already entered a book with the same ISBN, the system tells me I have a duplicate, like this: "Duplicate ISBN in your catalog." If I have another version of the same work in my library already, with a different ISBN (which is the case here), the system says: "There is another version of this work in Your sic books." I have been entering books by hand via ISBN since I joined in 2006, so believe me, it's not an issue of LT thinking I have a duplicate because I have another work.

>2 MarthaJeanne: I'm uncertain why you've posted this link.

Looking at my library listing further, it appears that even though I entered the book via the new ISBN, LT is attaching the old ISBN (0393307050), as well as some information related to that older edition (7th printing, for example, and a page number count that differs substantially from the new edition. It does list it as a 2021, book, though, which is correct).

I've heard that a source may have a list of isbns and you can match on the second one but LT grabs the first one

>7 jjwilson61: Yes, I've had that happen numerous times. It's one reason I always edit the book record immediately after adding it to my library, so I can double-check that the ISBN displayed is the one I searched on.