@niinap58883091 you can retain the licenses from your stock only subcription as long as the old subscription is in good standing when you switch. I would recommend contacting customer care for assistance because the retention is not automatic.
Please go to https://helpx.adobe.com/contact.html. Click on the chat icon in the lower right portion of the page. If you are unable to see this feature you may need to scroll down before it will appear or set your browser to private or incognito mode.