Illegal choice 0 in Allowed input formats element.

1. Creating brand new content type Test (default settings only).
2. Exported:

$content[type]  = array (
  'name' => 'Test',
  'type' => 'test',
  'description' => '',
  'title_label' => 'Tytuł',
  'body_label' => 'Treść',
  'min_word_count' => '0',
  'help' => '',
  'input_formats' => 
  array (
    1 => true,
    0 => 1,
    2 => false,
    3 => false,
    4 => false,
  ),
  'node_options' => 
  array (
    'status' => true,
    'promote' => true,
    'sticky' => false,
    'revision' => false,
    'moderate' => false,
  ),
  'autosave' => 0,
  'language_content_type' => '0',
  'upload' => '1',
  'show_preview_changes' => 1,
  'forward_display' => 1,
  'nodewords' => 1,
  'notifications_node_ui' => 
  array (
    'links' => true,
    'form' => false,
    'comment' => false,
    'block' => false,
  ),
  'i18n_node' => '1',
  'old_type' => 'test',
  'orig_type' => '',
  'module' => 'node',
  'custom' => '1',
  'modified' => '1',
  'locked' => '0',
  'content_profile_use' => 0,
  'comment' => '2',
  'comment_default_mode' => '4',
  'comment_default_order' => '1',
  'comment_default_per_page' => '50',
  'comment_controls' => '3',
  'comment_anonymous' => '0',
  'comment_subject_field' => '1',
  'comment_preview' => '1',
  'comment_form_location' => '0',
  'abuse_content_node_type_test' => 0,
  'fivestar' => 0,
  'fivestar_stars' => 5,
  'fivestar_labels_enable' => 1,
  'fivestar_label_0' => 'Cancel rating',
  'fivestar_label_1' => 'Poor',
  'fivestar_label_2' => 'Okay',
  'fivestar_label_3' => 'Good',
  'fivestar_label_4' => 'Great',
  'fivestar_label_5' => 'Awesome',
  'fivestar_label_6' => 'Give it @star/@count',
  'fivestar_label_7' => 'Give it @star/@count',
  'fivestar_label_8' => 'Give it @star/@count',
  'fivestar_label_9' => 'Give it @star/@count',
  'fivestar_label_10' => 'Give it @star/@count',
  'fivestar_style' => 'average',
  'fivestar_text' => 'dual',
  'fivestar_title' => 1,
  'fivestar_feedback' => 1,
  'fivestar_unvote' => 0,
  'fivestar_position_teaser' => 'hidden',
  'fivestar_position' => 'below',
  'fivestar_comment' => 0,
  'image_attach' => '0',
  'image_attach_size_teaser' => 'thumbnail',
  'image_attach_weight_teaser' => '0',
  'image_attach_size_body' => 'thumbnail',
  'image_attach_weight_body' => '0',
  'links_related_types' => '0',
  'print_display' => 1,
  'print_display_comment' => 0,
  'print_display_urllist' => 1,
  'print_mail_display' => 1,
  'print_mail_display_comment' => 0,
  'print_mail_display_urllist' => 1,
  'print_pdf_display' => 1,
  'print_pdf_display_comment' => 0,
  'print_pdf_display_urllist' => 1,
  'formblock_expose' => '0',
  'is_game' => '0',
  'xmlsitemap_node_type_priority' => '0.5',
  'xmlsitemap_old_priority' => '0.5',
  'feedapi' => 
  array (
    'enabled' => 0,
    'feedapi' => 
    array (
      'itemfilter' => 
      array (
        'feedapi_keyword_filter' => 
        array (
          'keywords' => '',
          'enabled' => 0,
          'weight' => '-15',
        ),
      ),
    ),
    'refresh_on_create' => 0,
    'update_existing' => 1,
    'skip' => 0,
    'items_delete' => '0',
    'parsers' => 
    array (
      'parser_simplepie' => 
      array (
        'enabled' => 0,
        'weight' => '0',
      ),
      'parser_common_syndication' => 
      array (
        'enabled' => 0,
        'weight' => '0',
      ),
      'parser_comments' => 
      array (
        'enabled' => 0,
        'weight' => '0',
      ),
    ),
    'processors' => 
    array (
      'feedapi_taxonomy_compare' => 
      array (
        'enabled' => 0,
        'weight' => '0',
      ),
      'feedapi_node' => 
      array (
        'enabled' => 0,
        'weight' => '0',
        'content_type' => 'poll',
        'node_date' => 'feed',
        'promote' => '3',
        'x_dedupe' => '0',
      ),
      'feedapi_inherit' => 
      array (
        'enabled' => 0,
        'weight' => '0',
        'inherit_taxonomy' => 1,
      ),
    ),
  ),
  'ant' => '0',
  'ant_pattern' => '',
  'ant_php' => 0,
);

3. Importing and there is an error:

Illegal choice 0 in Allowed input formats element.

Probably because of:

    0 => 1,

in 'input_formats' =>
but why?