Continuity

In fiction, continuity  is consistency of the characteristics of persons, plot, objects, places and events seen by the reader or viewer over some period of time. It is of relevance to several media.
Continuity is particularly a concern in the production of film and television due to the difficulty of rectifying an error in continuity after shooting has wrapped up. It also applies to other art forms, including novels, comics, anime, videogames and animation, though usually on a smaller scale.

 Here we can say some movie mistakes from star wars continutity errors are anything from different clothes or different props used !

Here we can see there are a few bushes in the background of the shot.

However when the footage is cut to the next scene they have vanished. this may show they have used a different location to the first shot or different place.