Initial task sync after migration to tw3 fails

Help, Support, and Bug Reporting
1

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What happened or what brings you here?

*Describe the issue or question.

I am not able to migrate to tw3 sync with wingtask from tw2. after following all instructions in the migration guide, initial task sync returns the below error:*

Failed to synchronize with server: Server Error: https://sync.wingtask.com/v1/client/get-child-version/8229ef96-9b31-4fbf-b132-9a47b3154596 responded with 410 Gone

Expected behavior

What did you expect to happen?
task sync to succeed

Actual behavior

Failed to synchronize with server: Server Error: https://sync.wingtask.com/v1/client/get-child-version/8229ef96-9b31-4fbf-b132-9a47b3154596 responded with 410 Gone

Environment

Operating System: (Arch Linux)

Device: Laptop

2

Hi guarav,

Thanks for the detailed report I was able to query the sync server and figure out what happened.

Your data on the WingTask sync server is healthy, your task history migrated over cleanly with no corruption. The 410 Gone error is happening because in Taskwarrior 3 your local Taskwarrior data keeps track of every time you sync and when you sync it will ask the server “give me what comes after version 8229ef96-…”, and the sync server is saying, “I don’t know about 8229ef96-…”.

How did this happen? Two most likely cases:

  1. You used the “Delete my Data” feature to clear your data. (and as of this writing on 2026-08-26 I haven’t added clear instructions that you should also clear the local sync state, which I will do shortly).

  2. You synced previously with a different Taskchampion Sync Server.

Fix:

  1. Export your tasks (keeps all your data safe):
    task export > ~/tasks_backup.json

  2. Back up and remove your local database:
    cp ~/.task/taskchampion.sqlite3 ~/.task/taskchampion.sqlite3.bak
    rm ~/.task/taskchampion.sqlite3

  3. Double check ~/.taskrc has the current WingTask sync credentials from Settings → Taskwarrior Sync.

  4. Re-import your tasks:
    task import ~/tasks_backup.json

  5. Sync:
    task sync

  6. Confirm the sync in the WingTask web UI; log in and check that your tasks appear there. This is the real confirmation it worked, since it’s reading independently from the server (not just your local database reflecting itself back).

  7. Once you’ve confirmed everything is there, you can delete the backup files (~/tasks_backup.json, ~/.task/taskchampion.sqlite3.bak) if you no longer want them, or keep them a while as a safety net.