When did the Scutum constellation receive its current name?
IAU's official website mentions that the names of the 88 current constellations (Scutum included) were standardised during the organizations inaugural meeting in 1922 and apparrently haven't been changed ever since.


  Celestial nomenclature has long been a controversial topic. At its inaugural meeting in 1922 in Rome, the IAU standardized the constellation names and abbreviations. More recently IAU Committees or Working Groups have certified the names of astronomical objects and features. In the following links you can find further information on how different objects and features are named.