FCM error results - refer error to token

when sending push messages through fcm (through nodejs firebase admin sdk), getting this error structure:

{
  "results": [
    {
      "error": {
        "code": "messaging/invalid-registration-token",
        "message": "Invalid registration token provided. Make sure it matches the registration token the client app receives from registering with FCM."
      }
    }
  ],
  "canonicalRegistrationTokenCount": 0,
  "failureCount": 1,
  "successCount": 0,
  "multicastId": SOME_ID
}

Is the index of the results relates to the index of the token array that was sent to firebase?