"Extensive reshoots" refers to the process of redoing or filming additional scenes for a movie or TV show after the principal photography has been completed. Full definition
Other films had it even worse — both «The Invasion» and «Jonah Hex» famously replaced their directors for extensive reshoots, with Oliver Hirschbiegel swapped out for James McTeigue on the former, and Jimmy Hayward for Francis Lawrence on the latter. (indiewire.com)
The film's director Ridley Scott did extensive reshoots of the film to replace Kevin Spacey who was accused of sexual harassment and assault amid the Weinstein fallout. (dailymail.co.uk)
Away from the big screen, the production was also plagued by stories of bizarre on - set behaviour, with director Josh Trank accused of being «erratic» and «indecisive» before extensive reshoots were eventually ordered without his involvement. (nme.com)