Discord bot /interactions commands structure definition

I am creating a Discord bot to collect user information when joining a community by prompting the user to provide the required profile data.

I have the following command:

const JOIN_COMMAND = {
  name: 'join',
  description: 'User requests to join the community and need to provide his/her profile information',
  //type: 1,
  options: [
    {
      type: 3, // STRING
      name: 'name',
      description: 'Please provide your name',
      required: true,
    },
    {
      type: 4, // INTEGER
      name: 'age',
      description: 'Please provide your age',
      required: true,
      min_value: 18,
      max_value: 90
    },
    {
      type: 1, // SUB_COMMAND
      name: 'gender',
      description: 'Please provide your gender',
      //required: true,
      "options": [
        {
            "name": "male",
            "description": "Male",
            "type": 3 // 1 is type SUB_COMMAND
        },
        {
            "name": "female",
            "description": "Female",
            "type": 3
        }
      ]      
    },
  ],
  integration_types: [0, 1],
  contexts: [0, 1, 2],
};

I get the following error when using PUT to update the existing command:

{
  "message": "Invalid Form Body",
  "code": 50035,
  "errors": {
    "1": {
      "options": {
        "2": {
          "_errors": [
            {
              "code": "APPLICATION_COMMAND_OPTIONS_TYPE_INVALID",
              "message": "Sub-command and sub-command group option types are mutually exclusive to all other types"
            }
          ]
        }
      }
    }
  }
}

It's strange because there is no "sub-command group" (type: 2) in the structure.

const JOIN_COMMAND = {
  name: 'join',
  description: 'User requests to join the community',
  type: 1,
  options: [
    {
        type: 3, // STRING
        name: 'name',
        description: 'Please provide your name',
        required: true,
      },
      {
        type: 4, // INTEGER
        name: 'age',
        description: 'Please provide your age',
        required: true,
        min_value: 18,
        max_value: 90
      },
      {
        type: 3, // SUB_COMMAND
        name: 'gender',
        description: 'Please provide your gender',
        required: true,
        choices: [
          {
            name: "Male",
            value: "Male"
          },
          {
            name: "Female",
            value: "Female"
          },
        ],
      },
  ],
  integration_types: [0, 1],
  contexts: [0, 1, 2],
};