What would cause Plex to show the exact same file as a duplicate?

Server Version#: 1.32.0.6918
Player Version#: Plex Web

What would cause this issue? I have several shows like this.

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What are your library paths set to (Manage Library > Edit > Add folders)? Do you have multiple folders that overlap (e.g. both /media/ and /media/TV)?

TV shows has a single folder path. And FWIW, this isn’t every show that’s doing it.

Actually it looks like the Plex Dance fixed it.

This can happen if, for example, you have a downloader which kicks off a Plex scan after downloading and you also have Plex configured to scan automatically when folder changes are detected. The two different scans result in two entries for the same file being detected under the same title. It’s recommended to have scans initiated automatically only by one source, either Plex or the downloader, not both.

While I don’t know enough to debate that with knowledge, that seems odd. Why would it allow two scans of the same directory to happen at the same time, causing the issue? And why doesn’t it check the file entry in the database to make sure that path isn’t already there? Even if there are two scans going on, there is only one database.

Are you sure that’s what’s going on?

Of course not. It was meant as guidance as to how you might mitigate this issue in the future.

Having said that, there are documented cases on these forums of this occurring. If I can find some time later I’ll try to look up a few for you.

As to how/why this would happen, keep in mind that the scanner is a separate executable from the server itself, and multiple instances can be executed at the same time. This includes situations where a downloader would manually invoke an execution and where Plex initiates its automatic scan, at the same time.

The recommendation here would be to rely on one system or the other for scans, but not both.

Also, there may be other reasons a double scan is taking place, this is just the most common.

nonono, sorry about that. You don’t have to prove anything. While that is odd behavior, I appreciate the insight.

That said, I just checked and did have the *arrs notifying Plex, as well as Plex watching for file changes. Hopefully that’s the issue. Thanks!

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