Why Sarmatians (eg. Roxolani, Alans) are Asians (Mongoloid)?

Sarmatians were Iranian tribes of Indo-European origin.

I don't understand why CA made them as Mongoloid type, as previously in Rome 2 done them correctly.

Alan units from Attila:

Roxolani and some other minor steppe factions are copied of Huns:

Roxolani in Rome 2:

Sarmatians from Column of Traian: