A continuity error might be a bad thing.
But it also might not.
In my opinion, continuity is the least important part of filmmaking.
If you had to worry about something on a set, and one of the problems is a continuity error... just throw the worry away.
Nobody's going to notice (so long as your movie's good).
And anyway, with so much going on in the world -
Who cares about continuity errors, really?
Cinema isn't about continuity.
Continuity simply aids in a movie's primary function: escape from reality via downloaded dreams.