if ($validate_decreasing) {
  $query = new EntityFieldQuery();
  $query->entityCondition('entity_type', 'commerce_auction_bid')
//          ->entityCondition('bundle', 'reverse_auction_bid')
    ->entityCondition('bundle', 'auction_bid')
    ->fieldCondition('reverse_auction_ref', 'target_id', $form_state['#node']->nid, '=')
    ->propertyOrderBy('changed', 'DESC')->range(0, 1);
  $result = $query->execute();
  if ($result) {
    $entity_id = array_shift($result['commerce_auction_bid']);
    $entity = entity_load('commerce_auction_bid', array($entity_id->id));
    $entity = $entity[$entity_id->id];

    $bid_amount_field = field_get_items('commerce_auction_bid', $entity, 'bid_amount');

    if ($bid_amount_field) {
      if ($bid_amount_field[0]['amount'] <= $bid_amount) {
        $amount = commerce_currency_amount_to_decimal($bid_amount_field[0]['amount'], commerce_default_currency());
        $currency = commerce_currency_load(commerce_default_currency());
//          form_set_error('bid_product][und][form][product_details', t('Your bid amount should be less than previous bid (@pre).', array('@pre' => $currency['symbol'] . $amount)));
//          form_set_error('bid_amount', t('Your bid amount should be less than previous bid (@pre).', array('@pre' => $currency['symbol'] . $amount)));
        drupal_set_message(t('Your bid amount should be less than previous bid (@pre).', array('@pre' => $currency['symbol'] . $amount)), 'error');
      }
    }

//      $product_field = field_get_items('commerce_auction_bid', $entity, 'field_product');
//      if ($product_field) {
//        $product = commerce_product_load($product_field[0]['product_id']);
//        $price = field_get_items('commerce_product', $product, 'commerce_price');
//        if ($price) {
//          if ($price[0]['amount'] <= $bid_amount) {
//            $amount = commerce_currency_amount_to_decimal($max_amount[0]['amount'], commerce_default_currency());
//            $currency = commerce_currency_load(commerce_default_currency());
//            form_set_error('bid_product][und][form][product_details', t('Your bid amount should be less than previous bid (@pre).', array('@pre' => $currency['symbol'] . $amount)));
//          }
//        }
//      }
  }
}