Index: branches/dev/html/install/index.php
===================================================================
--- branches/dev/html/install/index.php	(revision 11719)
+++ branches/dev/html/install/index.php	(revision 11720)
@@ -921,15 +921,13 @@
 	// ¸ÜµÒ
 	sfColumnExists("dtb_customer", "mailmaga_flg", "int2", $dsn, true);
-
-	if(sfTabaleExists("dtb_customer", $dsn)) {
-		if (sfColumnExists("dtb_customer", "mobile_phone_id", "", $dsn, true)) {
-			$objQuery = new SC_Query($dsn);
-			if ($objDBParam->getValue('db_type') == 'mysql') {
-				$objQuery->query("CREATE INDEX dtb_customer_mobile_phone_id_key ON dtb_customer (mobile_phone_id(64))");
-			} else {
-				$objQuery->query("CREATE INDEX dtb_customer_mobile_phone_id_key ON dtb_customer (mobile_phone_id)");
-			}
-		}
-	}
+	if (!sfColumnExists("dtb_customer", "mobile_phone_id", "", $dsn, true)) {
+		$objQuery = new SC_Query($dsn);
+		if ($objDBParam->getValue('db_type') == 'mysql') {
+			$objQuery->query("CREATE INDEX dtb_customer_mobile_phone_id_key ON dtb_customer (mobile_phone_id(64))");
+		} else {
+			$objQuery->query("CREATE INDEX dtb_customer_mobile_phone_id_key ON dtb_customer (mobile_phone_id)");
+		}
+	}
+
 	// ¸ÜµÒ¥á¡¼¥ë
 	if ($objDBParam->getValue('db_type') == 'mysql') {