There was a post by u/kafunshou on Reddit reporting this issue: by https://www.reddit.com/r/Anki/comments/r3d2e4/full_sync_required_without_comprehensible_reason/ I and other people also experience this issue, so I thought I’d double it here. The original post’s text: "On both my iOS devices, an …

In the last 24 hours, a portion of the AnkiWeb userbase was migrated onto new servers. This should have been transparent, but due to a bug, collections were marked as requiring a full sync when they were moved. Unfortunately it is not possible to remove the “full sync required” flag on AnkiWeb’s en…

It seems to be working OK for me and several others, but then it apparently seems there’s been at least one person whose collection became weird after either upload or downloading. I told them to file an issue on the forums, but there’s their post on reddit just in case: https://www.reddit.com/r/Ank…

Something about that report doesn’t add up, as the local decks shouldn’t change when choosing “upload”. They appear to be back up and running now in any case.

Yeah, I also thought it was weird. I thought maybe they mixed “upload” and “download” and actually downloaded. Maybe their issue was unrelated to the sync bug.

Full sync required without comprehensible reason

Anki Syncing & AnkiWeb

Topic		Replies	Views
After upgrading to 2.1.49, anki keeps forcing full sync of 400MB Help	3	914	November 29, 2021
Unexpected full sync Syncing & AnkiWeb	2	865	June 29, 2021
Problem Syncing/ error when downloading from AnkiWeb Syncing & AnkiWeb	10	1971	September 24, 2021
Clients are not in sync Syncing & AnkiWeb	3	2037	June 22, 2021
Sync produces incorrect Cards Due Count Syncing & AnkiWeb	5	1426	January 27, 2021

Full sync required without comprehensible reason

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