An error occurs when you submit the license key of a lower product edition.
You see the following message when using the vRealize Automation administration interface Licensing page to submit the key to a product edition that is lower than the current one. For example, you start with an enterprise license and try to enter an advanced license.
Unable to downgrade existing license edition
This vRealize Automation release does not support the downgrading of licenses. You can only add licenses of an equal or higher edition.
To change to a lower edition, reinstall vRealize Automation.