Hello,
I had duplicates contacts when typing their name but I solved it with the help of this page : https://www.alfredapp.com/help/troubleshooting/finding-contacts/
But I've got a problem when I use the "mail" command to write a mail to a contact : I have duplicates contacts appareeing.
I excluded from Spotlight all my adress books except my primary to avoid duplicates when searching contacts and it works fine. It also works fine with Workflows, even if the Scope field is Library/Application support/AddressBook, so I do not understand why I've got those duplicates when a use the "mail" command.
Perhaps a bug ? Or a mistake of me !
Thank you and best regards