if you have not created it yet. Go through the recipe Creating Odoo online instance in ,Getting Started with Odoo 10, for detailed instructions on how to create your online instance.
It is always preferred that before you do any operations on a master instance, such as installing or uninstalling a new application, or activating new features, that you duplicate the instance. To duplicate the instance, go through the recipe Accessing, duplicating, and renaming an instance in ,Getting Started with Odoo 10. If everything goes well, you can apply it to your master instance.
We assume that you have created a duplicate instance to test the installation and activation of new features.
