<p>Attempts to cancel an environment deployment on an <a>UpdateEnvironment</a> action, if the deployment is <code>IN_PROGRESS</code>. For more information, see <a href="https://docs.aws.amazon.com/proton/latest/userguide/ag-env-update.html">Update an environment</a> in the <i>Proton User guide</i>.</p> <p>The following list includes potential cancellation scenarios.</p> <ul> <li> <p>If the cancellation attempt succeeds, the resulting deployment state is <code>CANCELLED</code>.</p> </li> <li> <p>If the cancellation attempt fails, the resulting deployment state is <code>FAILED</code>.</p> </li> <li> <p>If the current <a>UpdateEnvironment</a> action succeeds before the cancellation attempt starts, the resulting deployment state is <code>SUCCEEDED</code> and the cancellation attempt has no effect.</p> </li> </ul>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}