fix: Update import logic to skip combinations without EAN and adjust file size in sync cache

import-product.php

@@ -78,6 +78,9 @@ foreach ( $products_array as $product )
 
   foreach ( $product['combinations'] as $combination )
   {
+    if ( empty( $combination['ean'] ) )
+      continue;
+
     $sql_combination = 'UPDATE `' . _DB_PREFIX_ . 'product_attribute` SET `price` = ' . (float)$combination['price'] . ' WHERE `reference` = \'' . pSQL($combination['ean']) . '\'';
     $result_combination = Db::getInstance()->execute($sql_combination);