There was a recent incident with the first printing of the Book of Common Prayer (the Church of England's official prayer book) after the death of Queen Elizabeth II.

The BCP includes both references to the current monarch, and to Queen Elizabeth I who ordered it to be compiled. Unfortunately someone at the publisher didn't realize this, and did a find and replace of (among other things) "King" for "Queen" and "Charles" for "Elizabeth", resulting in a page that referred to "Our Sovereign Lord CHARLES, by the grace of God, of England, France and Ireland, King, Defender of the Faith.”