From an administrative point of view, a WIPO trademark remains a title in existence even if it has been refused in all countries claimed.
This means that such a WIPO trademark can be used for a subsequent designation and a re-designation of refused countries and their new examinations by local Offices.
The interest is obvious: enabling the filing of a new WIPO trademark. And such a WIPO trademark can even be renewed by designating only one refused country.