I finally could get rid of this 'bug': I used 'Settings' / 'accounts' and saw I had three times the Google account defined. I deleted 2 of them and everything was suddenly OK.
So, now this bug is rather a wish: put a link from the 'Options' in the 'contacts' app to the place where you can manage accounts. Otherwise, you have no clue as to where the account(s) are defined. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1499663 Title: Contacts duplication synchronizing the same google account twice To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/address-book-app/+bug/1499663/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs