[-] BO : fixed duplicated rows with free order in dashboard stats #PSCFV-5626

controllers/admin/AdminHomeController.php

@@ -377,6 +377,7 @@ class AdminHomeControllerCore extends AdminController
 			SELECT total_paid / conversion_rate as total_converted, left(invoice_date, 10) as invoice_date
 			FROM '._DB_PREFIX_.'orders o
 			WHERE valid = 1
+			AND total_paid > 0
 			AND invoice_date BETWEEN \''.date('Y-m-d', strtotime('-7 DAYS', time())).' 00:00:00\' AND \''.date('Y-m-d H:i:s').'\'
 			'.Shop::addSqlRestriction(Shop::SHARE_ORDER).'
 		');