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[Feature] Prevent duplicate photos while logged in from two devices #169

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opened 2026-02-04 18:21:34 +03:00 by OVERLORD · 6 comments
OVERLORD commented 2026-02-04 18:21:34 +03:00
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Originally created by @hyperstown on GitHub (Jul 30, 2022).

Feature detail
When user uses one account on two different phones and both devices have same photo, app doesn't recognize that photo from one device has already been uploaded and uploads it from both phones creating duplicate.
It's rather undesired behavior since I'd like to have some photos on both phone while keeping one backup.
I did quick sha256sum check and both photos have exactly the same hash.

How it works now
Steps to reproduce the behavior:

  1. Create account
  2. Log in and enable backup on phone 1
  3. Log in and enable backup on phone 2
  4. Download some photo from the Internet on phone 1 then on phone 2
    (Photos from both are uploaded as unique files)

Expected behavior
A photo has been uploaded from device 1. So it doesn't uploads again from device 2

Originally created by @hyperstown on GitHub (Jul 30, 2022). <!-- Note: Please search to see if an issue already exists for the bug you encountered. --> **Feature detail** When user uses one account on two different phones and both devices have same photo, app doesn't recognize that photo from one device has already been uploaded and uploads it from both phones creating duplicate. It's rather undesired behavior since I'd like to have some photos on both phone while keeping one backup. I did quick sha256sum check and both photos have exactly the same hash. **How it works now** Steps to reproduce the behavior: 1. Create account 2. Log in and enable backup on phone 1 3. Log in and enable backup on phone 2 4. Download some photo from the Internet on phone 1 then on phone 2 (Photos from both are uploaded as unique files) **Expected behavior** A photo has been uploaded from device 1. So it doesn't uploads again from device 2
OVERLORD commented 2026-02-04 18:21:48 +03:00
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@alextran1502 commented on GitHub (Jul 30, 2022):

This is not a bug, there is no mechanism for deduplication on the server yet. As long as the photo/video is backed up from different devices, it will be treated as a unique file.

Deduplication on the server side is on the roadmap and will be worked on

@alextran1502 commented on GitHub (Jul 30, 2022): This is not a bug, there is no mechanism for deduplication on the server yet. As long as the photo/video is backed up from different devices, it will be treated as a unique file. Deduplication on the server side is on the roadmap and will be worked on
OVERLORD commented 2026-02-04 18:21:57 +03:00
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@hyperstown commented on GitHub (Jul 30, 2022):

Thanks for fast reply. I'll change it to feature request then. Is that ok?

@hyperstown commented on GitHub (Jul 30, 2022): Thanks for fast reply. I'll change it to feature request then. Is that ok?
OVERLORD commented 2026-02-04 18:22:04 +03:00
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@alextran1502 commented on GitHub (Jul 30, 2022):

Yes, that should be fine. Thank you

@alextran1502 commented on GitHub (Jul 30, 2022): Yes, that should be fine. Thank you
OVERLORD commented 2026-02-04 18:22:20 +03:00
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@hyperstown commented on GitHub (Jul 30, 2022):

Small rephrasing: done!
As for labels I don't have permissions.

@hyperstown commented on GitHub (Jul 30, 2022): Small rephrasing: done! As for labels I don't have permissions.
OVERLORD commented 2026-02-04 18:22:25 +03:00
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@MalteKiefer commented on GitHub (Aug 4, 2022):

@alextran1502 since you save the filename to the database, it should be easy.
We just need to add an API Endpoint to check if the data exists. Then we must update the uploader (mobil/web/cli) to check the endpoint instead of the server folder for existing images.

@MalteKiefer commented on GitHub (Aug 4, 2022): @alextran1502 since you save the filename to the database, it should be easy. We just need to add an API Endpoint to check if the data exists. Then we must update the uploader (mobil/web/cli) to check the endpoint instead of the server folder for existing images.
OVERLORD commented 2026-02-04 18:22:29 +03:00
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@Nonobis commented on GitHub (Aug 4, 2022):

Same as my 2 previous issues for me ... using name is not safe ...

https://github.com/immich-app/immich/issues/248
https://github.com/immich-app/immich/issues/185

@Nonobis commented on GitHub (Aug 4, 2022): Same as my 2 previous issues for me ... using name is not safe ... https://github.com/immich-app/immich/issues/248 https://github.com/immich-app/immich/issues/185
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Reference: immich-app/immich#169
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