diff --git a/database/upgrade/upg_northbound_cm.sql b/database/upgrade/upg_northbound_cm.sql
new file mode 100644
index 00000000..1d220429
--- /dev/null
+++ b/database/upgrade/upg_northbound_cm.sql
@@ -0,0 +1,6 @@
+--
+-- Table structure for table `northbound_cm`
+--
+
+DROP TABLE IF EXISTS `northbound_cm`;
+
diff --git a/database/upgrade/upg_northbound_pm.sql b/database/upgrade/upg_northbound_pm.sql
new file mode 100644
index 00000000..f1c2d911
--- /dev/null
+++ b/database/upgrade/upg_northbound_pm.sql
@@ -0,0 +1,6 @@
+--
+-- Table structure for table `northbound_pm`
+--
+
+DROP TABLE IF EXISTS `northbound_pm`;
+