Errors

media_gone

The file that message carried is no longer stored

Either the account's retention setting swept it, or the message has been detached from it. Sending the caption on its own would be a different message from the one you asked to repeat.

What to do

Upload the file again with POST /v1/media and send a new message with the id it returns.

The shape

{
  "error": {
    "type": "...",
    "code": "media_gone",
    "message": "...",
    "docs": "https://docs.njiwa.upeo.ai/errors/media_gone"
  }
}