Editing the "Host Name and IP Address Mapping" configuration, you accidentally hit the "Add" button and now cannot delete the empty field.
The empty field cannot be deleted because it is expecting valid data, host name and IP, for any further action. Attempting to delete the field without valid data results in the following error:
This issue will be fixed in the SMG 10.9.1 version. There are a couple of workarounds to delete the empty field: