The narrator of my audiobook reads a year or a four-digit number at the end of some sentences. How do I fix it?

Update to version 1.9.16 and render the affected chapters again. The numbers were not added by the audio engine: they were in the text, and the narrator read everything it was given. Usually they are source citations such as "(Covey, 2006)", read aloud as a year at the end of the sentence; sometimes they are formatting codes left in text that was pasted or imported from Word or the web, or recording time stamps in a book written from recordings, such as "(Episode 12, 14:05)". From 1.9.16 the narration leaves out citations, numbered sources like [1], those codes and the recording time stamps, as a professionally produced audiobook does. Years that are part of your prose are still read ("In 2019", "the film (1995)"). Your book and its exports keep their citations. "Start fresh" is not needed.