Cannot use POST methode with the ressource stock_availables

[Zenth]

Greetings,

I've been working prestashop webservices for the past weeks and now I'm tackling stock management. Reading the documentation, my guess is that I've to use ressource stock_availables to do that. However there is something wrong with the documentation : https://devdocs.prestashop.com/1.7/webservice/reference/
It says that GET, POST and HEAD methods are available for the ressource stock_available. But I can't use the POST method with Postman, giving me this error code : 

<prestashop xmlns:xlink="http://www.w3.org/1999/xlink">

    <errors>

        <error>

            <code>

                <![CDATA[101]]>

            </code>

            <message>

                <![CDATA[Method POST is not allowed for the resource stock_availables]]>

            </message>

        </error>

    </errors>

</prestashop>

And surprisingly, I can use the PUT method, which shouldn't be working if I'm reading the documentation correctly. I would like to know if it's just an issue with the documentation or if the problem is on my side.