BioFlow / API docs / Errors / stale_snapshot

`stale_snapshot`

HTTP 409application/problem+json

The draft changed since it was last read.

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What causes it

The draft changed between your read and your write — the expected_updated_at you sent no longer matches (optimistic concurrency).

How to fix it

Re-read the resource, take the fresh updated_at, re-apply your change, and retry with the new value.

Wire format

Example response body.

{
  "type": "https://getbioflow.com/docs/api/errors/stale-snapshot",
  "title": "The draft changed since it was last read",
  "status": 409,
  "instance": "urn:request:req_01abc",
  "code": "stale_snapshot",
  "request_id": "req_01abc"
}

Branch on the stable code field — title and detail are for humans and may change. type always resolves to this page. Quote request_id when contacting support. Full code registry on the API docs hub; the complete surface is in the interactive reference.