Unknown column in WHERE clause using addExpressionFieldToSelect in Magento Collection - sql

Question

I've a magento grid. I'm preparing the collection this way:
protected function _prepareCollection()
{
$listingData = Mage::helper('M2ePro/Data_Global')->getValue('temp_data');
// Get collection products in listing
//--------------------------------
$collection = Mage::helper('M2ePro/Component_Amazon')->getCollection('Listing_Product');
$collection->addExpressionFieldToSelect(
'hello',
'sum({{prod_id}})',
array('prod_id' => '`main_table`.`product_id`')
);
$collection->getSelect()->distinct();
$collection->getSelect()->where("`main_table`.`listing_id` = ?",(int)$listingData['id']);
//--------------------------------
The resulting select is:
SELECT DISTINCT `main_table`.*, `second_table`.*, sum(`main_table`.`product_id`) AS `hello`, `cpe`.`sku` AS `magento_sku`, `cisi`.`is_in_stock`, `cpev`.`value` FROM `sm_m2epro_listing_product` AS `main_table` INNER JOIN `sm_m2epro_amazon_listing_product` AS `second_table` ON `second_table`.`listing_product_id` = `main_table`.`id` INNER JOIN `sm_catalog_product_entity` AS `cpe` ON (cpe.entity_id = `main_table`.product_id) INNER JOIN `sm_cataloginventory_stock_item` AS `cisi` ON (cisi.product_id = `main_table`.product_id AND cisi.stock_id = 1) INNER JOIN `sm_catalog_product_entity_varchar` AS `cpev` ON ( `cpev`.`entity_id` = `main_table`.product_id ) INNER JOIN `sm_eav_attribute` AS `ea` ON (`cpev`.`attribute_id` = `ea`.`attribute_id` AND `ea`.`attribute_code` = 'name') WHERE (`main_table`.`component_mode` = 'amazon') AND (`main_table`.`listing_id` = 3) AND (cpev.store_id = (SELECT MAX(`store_id`) FROM `sm_catalog_product_entity_varchar` WHERE (`entity_id` = `main_table`.`product_id`) AND (`attribute_id` = `ea`.`attribute_id`) AND (`store_id` = 0 OR `store_id` = 7)))
But the program fails on:
$this->addColumn('ASIN_duplicate', array(
'header' => Mage::helper('M2ePro')->__('Duplicated'),
'width' => '20px',
'index' => 'hello',
));
With "Unknown column ‘hello' in WHERE clause".
Cannot figure out where's the problem.