idempotency_key_reused

Key reused with a different body · HTTP 409

What causes this

This idempotency key was already used for a request with a different payload. Replaying a key is only safe when the request is identical.

How to fix it

Use a fresh key for a different operation, or resend the original body to get the original response.

What the response looks like

{
  "error": {
    "code": "idempotency_key_reused",
    "status": 409,
    "message": "…",
    "hint": "…",
    "request_id": "req_…",
    "docs_url": "https://cloud.ngentix.ai/docs/errors/idempotency_key_reused"
  }
}

Quote the request_id if you contact support — it identifies your exact request in our logs.