In "Plan my book with me", how do I let the AI rewrite something I edited myself?

From version 1.9.24, a field you edited by hand shows "Edited by you · Let the AI change it". Click "Let the AI change it" and the AI may rewrite that field at your next request. You can also name it in your request: "change chapter 3", "chapters 3 and 4", "the last chapter", the chapter's title, or the field, such as the subtitle. Words that only say where something goes, like "between chapters 5 and 6" or "after chapter 5", do not release your edits.