Different versions of the Informatica MDM Hub cannot operate together in the same environment.
All components of your installation must be the same version, including the Informatica MDM Hub software and the databases in the Hub Store.
If you want to have multiple versions of Informatica MDM Hub at your site, you must install each version in a separate environment. If you try to work with a different version of a database, you will receive a message telling you to upgrade the database to the current version.