field_group_group_export_delete delete all groups from site!

If $group is null or not correct it's delete all groups from site!

function field_group_group_export_delete($group, $ctools_crud = TRUE) {

  $query = db_delete('field_group');

  if (isset($group->identifier)) {
    $query->condition('identifier', $group->identifier);
    if (!$ctools_crud) {
      ctools_export_crud_disable('field_group', $group->identifier);
    }
  }
  elseif (isset($group->id)) {
    $query->condition('id', $group->id);
  }

  if (!empty($group->mode)) {
    $query->condition('mode', $group->mode);
  }

  $query->execute();

  cache_clear_all('field_groups', 'cache_field');
  module_invoke_all('field_group_delete_field_group', $group);

}

Because function work as

  $query = db_delete('field_group');
  $query->execute();

Needs updates to prevent this