<p>Updates an existing state machine by modifying its <code>definition</code>, <code>roleArn</code>, or <code>loggingConfiguration</code>. Running executions will continue to use the previous <code>definition</code> and <code>roleArn</code>. You must include at least one of <code>definition</code> or <code>roleArn</code> or you will receive a <code>MissingRequiredParameter</code> error.</p> <p>If the given state machine Amazon Resource Name (ARN) is a qualified state machine ARN, it will fail with ValidationException.</p> <p>A qualified state machine ARN refers to a <i>Distributed Map state</i> defined within a state machine. For example, the qualified state machine ARN <code>arn:partition:states:region:account-id:stateMachine:stateMachineName/mapStateLabel</code> refers to a <i>Distributed Map state</i> with a label <code>mapStateLabel</code> in the state machine named <code>stateMachineName</code>.</p> <note> <p>All <code>StartExecution</code> calls within a few seconds will use the updated <code>definition</code> and <code>roleArn</code>. Executions started immediately after calling <code>UpdateStateMachine</code> may use the previous state machine <code>definition</code> and <code>roleArn</code>. </p> </note>

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

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