diff --git a/packaging/dbscripts/vms_sp.sql b/packaging/dbscripts/vms_sp.sql
index a09a4a89dda..0cad6e291f0 100644
--- a/packaging/dbscripts/vms_sp.sql
+++ b/packaging/dbscripts/vms_sp.sql
@@ -2507,6 +2507,10 @@ BEGIN
         DELETE FROM vm_nvram_data
         WHERE vm_id = OLD.vm_guid;
     END IF;
+    IF OLD.bios_type = 3 AND NEW.bios_type = 4 THEN
+	DELETE FROM vm_nvram_data
+	WHERE vm_id = OLD.vm_guid;
+	END IF;
     RETURN NEW;
 END;$$
 LANGUAGE plpgsql;