Production on the film was shut down for three weeks in 2014 when Ford was seriously injured after getting trapped by the door of the Millennium Falcon spaceship, reported Contactmusic.
During a Tribeca Film Festival interview in New York, Abrams said, "I was on the set of the Millennium Falcon, and we started working with (characters) Rey and Finn; the first time we did it, it didn't work at all as we wrote it. They were much more contentious.
"So when we went back to work again, we actually just reshot those scenes from the ground up, and it was an amazingly helpful thing to get these two characters to where they needed to be.