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:

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