In order to do this amazing things you must migrate your apes. Don’t worry, the migration process will give you an exact monkey as you own (preserving the date of born, type, edition, and the fantastic name you have given it). You can perform the migration from the option on sidebar, there you will see your current apes and you can migrate them, it is free (you just pay the gas for the transaction). It only applies for apes you already owned, if you buy a new one you don’t need to do this process (and you will not be able to do it indeed).