def METHOD_NAME(test_client, db_session, auth_headers, setup_info):
    test_data = {
        'mine_guid': setup_info['mine_guid'],
        'party_guid': setup_info['party_guid'],
        'mine_party_appt_type_code': "MMG",
        'start_date': str(setup_info['existing_mine_manager'].end_date.date()),
        'end_date': None,
    }
    post_resp = test_client.post(
        '/parties/mines', data=test_data, headers=auth_headers['full_auth_header'])
    post_data = json.loads(post_resp.data.decode())
    assert post_resp.status_code == 400, post_resp.response