The only field that can be edited in your Sphere account is the "How did you hear about us" field. All editing of other Standard Fields must be done by Support. Please contact Support for assistance in that situation. 

To edit the label for the "How did you hear about us" field in Sphere:
  1. Navigate to Contacts > Database Management > Field Management.
  2. Click Manage Custom Fields.
  3. Expand the Standard Profile Fields folder.
  4. Click Edit next to the field.
  5. Enter the new Label for the field.
  6. Click Save.
If you have additional question please Chat with Support.