SQL syntax error with empty decimal number list

Sorry for my poor english, maybe I wasn't clear enough. I mean that I have created a field (with widget type = select list) and add some values to it. But when I create a node of this type (with this field, which has 'field_time_zone_value' name, as you've pointed) - and then I've got this error.

Now, I decided to make a new clean test. I have download and install clean copy of Drupal 6.2, install latest CCK 6.x-2.0-beta and create a new type of content. I've named it 'company'. Then, I've added just one field to it - 'field_number'. It's a number_decimal field with 'select list' widget. I've added values to it - '1, 2, 3, 4, 5' (in textarea 'Allowed values list' - each on new line). I didn't check 'Required' checkbox - so I think I can just ignore this field upon node creation (it will allow empty value). Then, I've save this field and go to 'create new content' page. There I have add new node of this type ('company'), add title to it, BUT didn't select any value in field_number list. I have press 'Save' and then again this error:

user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 query: INSERT INTO content_type_company (vid, nid, field_number_value) VALUES (1, 1, ) in D:\portal\drupal\www\sites\all\modules\cck\content.module on line 1084.

You was right about UPDATE query instead of INSERT. When I save new node, I've got this error (with INSERT), but when I go to edit this node and again - didn't select any value in list - there is another error:

user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE vid = 1' at line 1 query: UPDATE content_type_company SET vid = 1, nid = 1, field_number_value = WHERE vid = 1 in D:\portal\drupal\www\sites\all\modules\cck\content.module on line 1084.

So, I hope you can repeat my steps and get same errors to find bug. I just want to create list of decimal numbers that is not required to fill - with allowed empty value.

There is my export for this node type and field:

$content[type]  = array (
  'name' => 'Company',
  'type' => 'company',
  'description' => 'Simple company type.',
  'title_label' => 'Title',
  'body_label' => 'Body',
  'min_word_count' => '0',
  'help' => '',
  'node_options' => 
  array (
    'status' => true,
    'promote' => true,
    'sticky' => false,
    'revision' => false,
  ),
  'old_type' => 'company',
  'orig_type' => '',
  'module' => 'node',
  'custom' => '1',
  'modified' => '1',
  'locked' => '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',
);
$content[fields]  = array (
  0 => 
  array (
    'label' => 'Number',
    'field_name' => 'field_number',
    'type' => 'number_decimal',
    'widget_type' => 'optionwidgets_select',
    'change' => 'Change basic information',
    'weight' => '',
    'description' => '',
    'default_value_widget' => 
    array (
      'field_number' => 
      array (
        0 => 
        array (
          'value' => '',
        ),
      ),
    ),
    'default_value_php' => '',
    'required' => '0',
    'multiple' => '0',
    'min' => '',
    'max' => '',
    'precision' => '10',
    'scale' => '2',
    'decimal' => '.',
    'prefix' => '',
    'suffix' => '',
    'allowed_values' => '1
2
3
4
5',
    'allowed_values_php' => '',
    'module' => 'number',
    'widget_module' => 'optionwidgets',
    'columns' => 
    array (
      'value' => 
      array (
        'type' => 'numeric',
        'precision' => '10',
        'scale' => '2',
        'not null' => false,
        'sortable' => true,
      ),
    ),
    'default_value' => 
    array (
      0 => 
      array (
        'value' => '',
      ),
    ),
    'display_settings' => 
    array (
      'label' => 
      array (
        'format' => 'above',
      ),
      'teaser' => 
      array (
        'format' => 'default',
      ),
      'full' => 
      array (
        'format' => 'default',
      ),
      4 => 
      array (
        'format' => 'default',
      ),
    ),
  ),
);