I’m trying to set an (primary) email address on a contact following the solution provided in [How to add an email to a contact module using the v8 API?] and it seems that the email address gets linked 2 times to the contact. It gets linked as the primary address and also as a normal address. Is there a way that I can only set the primary email address of a contact? Do I need to use a special relationship name when creating the link and where can I find these relationship names as this is not very well documented. Any help is highly appreciated.