Seems like one of your clients is a pre-release version and has upgraded the sync target. You can either update all your clients to the latest pre-release versions (apart from iOS and CLI which do not have packages yet) or clear everything down including your online storage and start again using just release versions.
Pre-releases
Important: This pre-release will ask you to upgrade your sync target and, once it is done, only the latest clients will be able to sync with this sync target. Currently that includes the desktop ap...
Posting Informing Users
The latest pre-release includes two major new features and as always your help to test them would be much appreciated!
Sync target upgrade
The first one is a mechanism to upgrade and lock the sync target. In this version, it only makes small changes so as to put the feature in place and verify that it’s all working (so far there’s no known issue).
As a result, when you start the app it will ask you to upgrade the sync target. Once it is done, only the latest clients will be able to sync with t…
Others reporting a similar problem
Tried setting up Joplin on a reinstall and now when i sync to dropbox i get this error. I am running the latest version on both android and Arch.
Last error: Error: Sync version of the target (2) does not match sync version supported by client (1). Please upgrade your client.
Sync still works on my android running version 1.0.337.
OS: Arch Linux
Joplin Version: 1.0.233
Using the latest iOS Joplin app syncing is not possible anymore.
I use the lastest desktop version of Joplin, but the the iSO app will not sync. Seems it needs and update.
When will this update be available?