# `version_sunset`: Move to a served API version

The `Cardog-Version` header named a dated version that is past its support window.

## What happened

A `409 version_sunset` means the version you pinned is known but no longer served. A version is served for 12 months after the next one lands; `message` names the day it stopped. Nothing about the request other than the version is wrong.

## Do this next

Read the migration guide linked in `hint`, update your integration to the newer shape, and send a version `hint` names (or upgrade the SDK, which pins its own date). Omitting the header returns the oldest version still served.

## Corrected request

```bash

# Pin the version the hint names:
curl "https://api.cardog.app/v2/vin/2T3R1RFV7MW180266" \
  -H "x-api-key: $CARDOG_API_KEY" \
  -H "Cardog-Version: <a version the hint names>"

```