diff --git a/09.M3P2-data-base/default.en.md b/09.M3P2-data-base/default.en.md
index cf0c16d54..aaa31ee46 100644
--- a/09.M3P2-data-base/default.en.md
+++ b/09.M3P2-data-base/default.en.md
@@ -1,4 +1,5 @@
 ---
 published: false
+visible: false
 ---