flow_already_running

This flow is already running for this customer · HTTP 409

What causes this

A run of this flow for this customer was still going (a scheduled run, or another Run now). Two at once would send the same records twice, so the second was not started.

How to fix it

Wait for the current run to finish (it shows on the flow's Runs tab), then run it again.

What the response looks like

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

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