You could try deleting your address book file 'yourname.wab'. Then if you re-start your p/c it should create a replacement wab file.
First though make a copy of the contact data in your address book.
Hands-on: Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
Samsung's beautifully designed Galaxy S8 makes for better VR experiences too
47 iPhone camera tips to help you take better photos
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.