INTENT_ALREADY_SUBMITTED

This idempotency key was already used.

HTTP status	409
Group	Relay path
Retryable	No — sending it again changes nothing
Re-sign	NONE — do not ask the user to sign anything

What happened

The key maps to an intent we already accepted; replaying it must not create a second one.

What to do

Read the intent member: it is the first submission. Track that one.

Extra members

This code carries intent in the problem document, on top of the common members.

The problem document

Every error is application/problem+json (RFC 9457) with the same shape:

{
  "type": "https://docs.co-relayer.com/errors/intent-already-submitted",
  "title": "This idempotency key was already used.",
  "status": 409,
  "detail": "A sentence about this specific occurrence.",
  "instance": "req_01JB…",
  "code": "INTENT_ALREADY_SUBMITTED",
  "retryable": false,
  "resign": "NONE",
  "hint": "Read the `intent` member: it is the first submission. Track that one."
}

See the error model for what each member means and how to handle unknown codes.