Unable to Transfer Account Holder to a Managed AppleID Account

Hi,

I am unable to transfer the account holder role to over to my managed AppleID Account, I get a message informing that my account is not eligible as an account holder.

Any idea why this may be? It will allow the transfer from a non managed AppleID, I am able to assign other roles to my managed AppleID so it is a bit confusing into why this will not work. I can't find any apple documentation on this topic as well