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The API, CLI and MCP return data_change_in_progress with HTTP 409. Repeating the same request, with the same idempotency key, after a wait can succeed.

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What to do

A data change of this project is running. Wait until its operation has finished (‘ohmyhost project status —project ULID —json’), then repeat the request unchanged. If the steps above do not resolve it, report it with the request_id from the error.