diff --git a/src/main/scala/com/github/shadowsocks/database/DBHelper.scala b/src/main/scala/com/github/shadowsocks/database/DBHelper.scala
index d1be0107..e29c8548 100644
--- a/src/main/scala/com/github/shadowsocks/database/DBHelper.scala
+++ b/src/main/scala/com/github/shadowsocks/database/DBHelper.scala
@@ -105,11 +105,15 @@ class DBHelper(val context: Context)
           " ipv6, individual FROM `tmp`;")
         profileDao.executeRawNoArgs("DROP TABLE `tmp`;")
         profileDao.executeRawNoArgs("COMMIT;")
-      } else if (oldVersion < 13) {
+        return
+      }
+
+      if (oldVersion < 13) {
         profileDao.executeRawNoArgs("ALTER TABLE `profile` ADD COLUMN tx LONG;")
         profileDao.executeRawNoArgs("ALTER TABLE `profile` ADD COLUMN rx LONG;")
         profileDao.executeRawNoArgs("ALTER TABLE `profile` ADD COLUMN date VARCHAR;")
       }
+
       if (oldVersion < 15) {
         profileDao.executeRawNoArgs("ALTER TABLE `profile` ADD COLUMN userOrder LONG;")
         var i = 0