Library app duplicates the reading issue

Hello,

First, thank you for the amazing suit of apps, and especially for the recent update with the dark theme support! Beautiful.

Some time ago I created a new library of comics on a new external HDD, and it was working great. But after some time the library app started showing duplicates for each issue that showed in a reading list (the default list). The file itself isn't duplicated, it's just the visual doppelganger in the app, for some reason.

Here's the screenshot:
take.ms/JcEhX

So if I mark one of the 2 duplicated issues as unread, this removes both issues. So there's no way to remove just one duplicate.

I'm on Macbook, macos Tahoe 26.4.1, the freshest version of your suit (but the bug happened on the previous version, and it transferred to this new version, sadly).

Can you help me with fixing this bug?

Hmmm, are you 100% sure the issue is not duplicated? If you use the search engine does it appear twice? I guess I can remove duplicates from the reading list but I'd like to understand first why this is happening.]

Inside your library root folder there is a hidden folder called .yacreaderlibrary, it contains a database file inside library.ydb, can you send it to me by email please? You can find the email in the contact section of this web.

Thanks for such a quick response!

Yes, I'm sure it's not the duplicated file, if that's what you mean. Here's the screenshot of the folder I access through 'Open the containing folder' context command in the library app: take.ms/zxbfR

You can see the first Aliens comic highlighted here, the same one that is showing twice in the reading list in my previous screenshot.

I do have a backup of this folder, as I found right now, but it's in entirely different folder, though on the same external HDD. And as I understand, it shouldn't be included in the library in any way, since I have my library set up for the entirely different folder.

Here's my library folder: '/Volumes/Treasure Trove/Comix Zone/'

Here's the backup folder: '/Volumes/Treasure Trove/00_Бэкап SiliconePower 2Tb/Comics'

And I found the hidden file you mention, and am sending you it via an email.

Thank you for helping out!

The actual issue was that the library contained duplicates.