For an interesting look in to this, see The Commissar Vanishes: The falsification of images in Stalin's Russia.
https://www.indexoncensorship.org/2017/08/commissar-vanishes...
https://www.amazon.com/Commissar-Vanishes-Falsification-Phot...
http://tfustudios.blogspot.com/2009/11/commissar-vanishes.ht...
The first photo above shows an eerie example: So many of the commissars have been removed from the official history, that Stalin is alone in the photo.