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@@ -99,3 +99,29 @@ After removing the containers and volumes, the **Files** can be cleaned up (if n
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### Why iOS app shows duplicate photos on the timeline while the web doesn't?
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If you are using `My Photo Stream`, the Photos app temporarily creates duplicates of photos taken in the last 30 days. These photos are included in the `Recents` album and thus shown up twice. To fix this, you can disable `My Photo Stream` in the native Photos app or choose a different album in the backup screen in Immich.
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+
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+### How can I move all data (photos, persons, albums) from one user to another?
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+
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+This requires some database queries. You can do this on the command line (in the PostgreSQL container using the psql command), or you can add for example an [Adminer](https://www.adminer.org/) container to the `docker-compose.yml` file, so that you can use a web-interface.
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+
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+:::warning
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+This is an advanced operation. If you can't to do it with the steps described here, this is not for you.
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+:::
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+
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+1. **MAKE A BACKUP** - See [backup and restore](/docs/administration/backup-and-restore.md).
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+2. Find the id of both the 'source' and the 'destination' user (it's the id column in the users table)
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+3. Three tables need to be updated:
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+
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+ ```sql
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+ // reassign albums
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+ update albums set "ownerId" = '<destinationId>' where "ownerId" = '<sourceId>';
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+
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+ // reassign people
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+ update person set "ownerId" = '<destinationId>' where "ownerId" = '<sourceId>';
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+
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+ // reassign assets
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+ update assets set "ownerId" = '<destinationId>' where "ownerId" = '<sourceId>'
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+ and checksum not in (select checksum from assets where "ownerId" = '<destinationId>');
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+ ```
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+
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+4. There might be left-over assets in the 'source' user's library if they are skipped by the last query because of duplicate checksums. These are probably duplicates anyway, and can probably be removed.
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BMaster