stale_snapshot

HTTP 409 · application/problem+json · The draft changed since it was last read.

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.

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 (https://getbioflow.com/docs/api/errors/stale-snapshot) 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.