Thousands of people watched a film posted in its entirety to YouTube by its US distributor before the apparent mistake was tackled.
Sony Pictures Entertainment had labelled the video as being a trailer for the movie Khali the Killer.
But its 90 minute duration acted as a giveaway that the upload contained more than just highlights from the film.
The video was wiped after being online for more than six hours but not before news of its availability had spread.
CBR.com - which seems to have been the first news site to report the discovery - described it as an "epic mistake".
Members of the public also made fun of the find via social media.
Sony has not responded to the BBC's request for comment.
Source:
BBC