It's an iconic photograph ... Jackie Robinson shaking hands with George Shuba -- the first time a white player and a black player did so in pro ball -- but the producers of "42" screwed it up in the new flick ... so says the man in the photo.
88-year-old George "Shotgun" Shuba -- who played ball with Robinson back in the 40s (above) -- tells TMZ he's disappointed producers chose to re-write history and CUT him from the famous scene.
George tells us, "I just wish they would have portrayed it correctly -- April 18, 1946 -- when I shook hands with Jackie as he crossed home plate in his first home run ever."
FYI: The scene in "42" randomly shows Jackie shaking hands with TWO white men at home plate instead, none of whom are George.
George's son was equally upset, "The producers should have done their research. Jackie was scared none of his teammates would shake his hands in public. That was a very historic moment that they eliminated."
Despite the snub, the Shubas aren't looking for an apology ... they simply want to set the record straight for younger generations, who may not know the real story.