diff --git a/install-dev/upgrade/sql/1.5.0.0.sql b/install-dev/upgrade/sql/1.5.0.0.sql
index 94a1e36d6..12392446b 100755
--- a/install-dev/upgrade/sql/1.5.0.0.sql
+++ b/install-dev/upgrade/sql/1.5.0.0.sql
@@ -1,4 +1,7 @@
 SET NAMES 'utf8';
+
+DROP TABLE IF EXISTS `PREFIX_group_shop`;
+
 CREATE TABLE IF NOT EXISTS `PREFIX_group_shop` (
   `id_group_shop` int(11) unsigned NOT NULL AUTO_INCREMENT,
   `name` varchar(64) CHARACTER SET utf8 NOT NULL,
diff --git a/install-dev/upgrade/sql/1.5.0.10.sql b/install-dev/upgrade/sql/1.5.0.10.sql
index 99860f0f5..82899d281 100644
--- a/install-dev/upgrade/sql/1.5.0.10.sql
+++ b/install-dev/upgrade/sql/1.5.0.10.sql
@@ -4,6 +4,8 @@
 
 UPDATE `PREFIX_meta` SET `page` = 'contact' WHERE `page` = 'contact-form';
 
+DROP TABLE IF EXISTS `PREFIX_shop_group`;
+
 RENAME TABLE `PREFIX_group_shop` TO `PREFIX_shop_group`;
 ALTER TABLE `PREFIX_shop_group` CHANGE `id_group_shop` `id_shop_group` INT( 11 ) UNSIGNED NOT NULL AUTO_INCREMENT;
 ALTER TABLE `PREFIX_shop` CHANGE `id_group_shop` `id_shop_group` INT( 11 ) UNSIGNED NOT NULL;