can add module only on creation

content/modules/add-module-to-database.md

@@ -14,11 +14,13 @@ aliases:
 Modules add additional functionality to your databases for specific use cases.
 You can add modules to the database when you create the database.
 
-## Add modules to a database
+## Create a database with a module
 
 {{< note >}}
 - Before you add a module to a database,
     we recommend that you [upgrade the module]({{< relref "/modules/add-module-to-cluster.md" >}}) to the latest version.
+- Modules can be add to database only when creating a new database.
+    You can't add a module to an existing database.
 - After you add a module to the database,
     certain database fields for the database are disabled according to the supported capabilities of the module.
 {{< /note >}}

content/rs/administering/creating-databases/_index.md

@@ -78,7 +78,12 @@ for this database. Minimum RAM portion is 10%, and maximum RAM portion is 50%.
     - [**Redis Modules**]({{< relref "/rs/developing/modules/_index.md" >}}) - When you create a new in-memory database,
         you can enable multiple Redis modules to the database.
         For RoF databases, you can add modules that support RoF.
-
+
+        {{< note >}}
+        Modules can be add to database only when creating a new database.
+        You can't add a module to an existing database.
+        {{< /note >}} 
+
         To add a module to the database:
 
         1. In the Redis Modules field, click ![Add](/images/rs/icon_add.png#no-click "Add").