Before a contact property's option is updated, you can select whether such should also update contacts to reflect option changes. In other words, whether you would you like X contact(s) with value 'A' to have value 'B' when the value of a contact property is updated.
- Navigate to Contacts > Contacts Settings > Contact Properties to access the setting displayed above within a particular Contact Property.
- Search and select the contact property in question > click on Edit Options.
- Select the checkbox Update contacts to reflect option changes.