diff --git a/docs/api/customers.rst b/docs/api/customers.rst
index 0a6f0fec322..29a5d484602 100644
--- a/docs/api/customers.rst
+++ b/docs/api/customers.rst
@@ -53,7 +53,7 @@ If you request for a more detailed data, you will receive an object with followi
 +-------------------------+-------------------------------------------+
 | birthday                | Customers birthday                        |
 +-------------------------+-------------------------------------------+
-| groups                  | Array of groups customer belongs to       |
+| group                   | Customer group code                       |
 +-------------------------+-------------------------------------------+
 
 .. note::
@@ -81,7 +81,7 @@ Definition
 +--------------------------+----------------+------------------------------------------------------------------------------------------------------+
 | lastName                 | request        | Customer's last name                                                                                 |
 +--------------------------+----------------+------------------------------------------------------------------------------------------------------+
-| groups                   | request        | *(optional)* Array of groups customer belongs to                                                     |
+| group                   | request        | *(optional)* Customer group code                                                                      |
 +--------------------------+----------------+------------------------------------------------------------------------------------------------------+
 | gender                   | request        | Customer's gender                                                                                    |
 +--------------------------+----------------+------------------------------------------------------------------------------------------------------+
@@ -139,9 +139,7 @@ Exemplary Response
         "firstName":"John",
         "lastName":"Diggle",
         "gender":"m",
-        "group":[
-
-        ]
+        "group":{}
     }
 
 If you try to create a customer without email or gender, you will receive a ``400 Bad Request`` error.
@@ -244,9 +242,7 @@ Exemplary Response
         "firstName":"Levi",
         "lastName":"Friesen",
         "gender":"u",
-        "group":[
-
-        ]
+        "group":{}
     }
 
 Collection of Customers
@@ -428,7 +424,7 @@ Definition
 +--------------------------+----------------+------------------------------------------------------------------------------+
 | lastName                 | request        | Customers last name                                                          |
 +--------------------------+----------------+------------------------------------------------------------------------------+
-| groups                   | request        | *(optional)* Array of groups customer belongs to                             |
+| group                    | request        | *(optional)* Customer group code                                             |
 +--------------------------+----------------+------------------------------------------------------------------------------+
 | gender                   | request        | Customers gender                                                             |
 +--------------------------+----------------+------------------------------------------------------------------------------+
@@ -534,7 +530,7 @@ Definition
 +--------------------------+----------------+--------------------------------------------------+
 | lastName                 | request        | *(optional)* Customers last name                 |
 +--------------------------+----------------+--------------------------------------------------+
-| groups                   | request        | *(optional)* Array of groups customer belongs to |
+| group                    | request        | *(optional)* Customer group code                 |
 +--------------------------+----------------+--------------------------------------------------+
 | gender                   | request        | *(optional)* Customers gender                    |
 +--------------------------+----------------+--------------------------------------------------+
diff --git a/docs/customization/factory.rst b/docs/customization/factory.rst
index 6a5e45fc19a..041193f2af4 100644
--- a/docs/customization/factory.rst
+++ b/docs/customization/factory.rst
@@ -81,7 +81,7 @@ Take its interface (``Sylius\Component\Product\Factory\ProductFactoryInterface``
         public function createDisabled(): ProductInterface
         {
             /** @var ProductInterface $product */
-            $product = $this->decoratedFactory->createNew();
+            $product = $this->decoratedFactory->createWithVariant();
 
             $product->setEnabled(false);
 
@@ -104,10 +104,11 @@ as a decorating service in the ``app/Resources/config/services.yml``.
 **3.** You can use the new method of the factory in routing.
 
 After the ``sylius.factory.product`` has been decorated it has got the new ``createDisabled()`` method.
-You can for example override ``sylius_admin_product_create_simple`` route like below:
+To actually use it overwrite ``sylius_admin_product_create_simple`` route like below in ``app/config/routing/admin/product.yml``:
 
 .. code-block:: yaml
 
+    # app/config/routing/admin/product.yml
     sylius_admin_product_create_simple:
         path: /products/new/simple
         methods: [GET, POST]
@@ -126,6 +127,23 @@ You can for example override ``sylius_admin_product_create_simple`` route like b
                     route:
                         name: sylius_admin_product_create_simple
 
+Create a new yaml file located at ``app/config/routing/admin.yml``, if it does not exist yet.
+
+.. code-block:: yaml
+
+    # app/config/routing/admin.yml
+    app_admin_product:
+        resource: 'admin/product.yml'
+                        
+Remember to import the ``app/config/routing/admin.yml`` into the ``app/config/routing.yml``.
+
+.. code-block:: yaml
+
+    # app/config/routing.yml
+    app_admin:
+        resource: 'routing/admin.yml'
+        prefix: /admin
+
 .. include:: /customization/plugins.rst.inc
 
 Learn more