A question about the authenticity of the bust of a woman from Chicago Art Institute

https://www.artic.edu/artworks/159136/portrait-bust-of-a-woman

Drawing of the diadem from the publication The Art Institute of Chicago, 2017 Roman Art

Marble female bust from Thebes. Depicts a priestess, as indicated by the headband (strophion) in her hair. Circa 150-160 CE
Archaeological Museum of Thebes. Description from the museum catalog, p. 351; ISBN 978-960-89339-8-9
Pictures:
https://www.archaiologia.gr
https://www.mthv.gr