I am using 2 instances on 2 machines of Joplin for Desktop 2.9.17 (prod, darwin) on macOS Ventura 13.2.1, 2.9.17 (prod, linux) on ArchLinux, and Joplin 2.10.8 on Android 13 TP1A.221005.002 (Google Pixel 5). That's a total of 4 clients.
I am syncing through Nextcloud 25.0.4 using the Nextcloud synchronization target, not WebDAV, file system, or Joplin Server.
Recently, Nextcloud, which I run in 3 Docker containers, autoupgraded (which, it seems, I need to disable). Sometimes this requires the database to be manually upgraded and in the meantime the system goes into maintenance mode. In this case, it was in such a state for about a day before I noticed.
During that time, Joplin was failing to synchronize and got hung. I restarted the clients that got stuck (all but Android). The ArchLinux and Android clients synchronized without any complaint and seem to be up-to-date but both of the macOS clients were showing conflicts so I chose to run the command "delete local data and re-download from sync target". Now, BOTH of the latter clients are giving this error and the synchroization halts very early in the process:
Created local items: 12. Fetched items: 13/50. Completed: 2023-03-10 1:22 AM (55s) Last error: Error: On file 00d9c6a7b6224b19a0a4f1e0b9afbfde.md: Invalid property format: master_k: [REDACTED] id: 00d9c6a7b6224b19a0a4f1e0b9afbfde parent_id: 6a2a7bc657c04b39a8900ebc73fe0366 created_time