409 Conflict · type conflict
When it happens
Within the last 24 hours, the same key was sent with a different request: another path, another body, or another acting broker. Bodies are compared byte for byte, so re-serializing the same data can count as different (keys reordered, spacing changed).
What to do
Use a new key for a new request. To retry, resend the exact bytes you sent the first time. See idempotency.
Example
409 Conflict