Can only edit scheduled or active posts

The Synup API returns SY75017 in the errors array when this happens.

What the response looks like

{
  "data": null,
  "errors": [
    {
      "message": "Can only edit scheduled or active posts",
      "context": {},
      "code": "SY75017"
    }
  ]
}

Where it comes from

Documented under Promotional Posts. The context field carries the offending value when one is relevant, and is empty otherwise.

See the full error code reference for every code the API can return.

Other Promotional Posts errors