Notice: "Undefined index" when removing components used in conditionals

I took a look but it was above me, but here is the error i am getting

Notice: Undefined index: 9 in webform_conditional_prepare_javascript() (line 834 of /var/www/html/production/aeesolar.com/sites/all/modules/webform/includes/webform.conditionals.inc).

the code block its referring to is: (line 832 - 842)

<?php
 // Add on the list of rules to the conditional group.
    foreach ($conditional['rules'] as $rule) {
      if ($rule['source_type'] == 'component') {
        $source_component = $node->webform['components'][$rule['source']];
        $source_parents = webform_component_parent_keys($node, $source_component);
        $source_id = 'webform-component-' . str_replace('_', '-', implode('--', $source_parents));

        // If this source has a value set, add that as a setting.
        if (isset($submission_data[$source_component['cid']])) {
          $source_value = $submission_data[$source_component['cid']];
          $settings['values'][$source_id] = is_array($source_value) ? $source_value : array($source_value);
        }
?>