I have the original file InDesign of a book. Kindle Direct Publishing says that there is a margin error, so the only thing to do is to fix it. Here is the error
nterior Your file contains insufficient bleed. See examples PDF page(s) 6, 132 - 133. 1. Ensure the page(s) are sized correctly for bleed. Interiors with bleed should have 0.125" (3.2 mm) added to the width and 0.25" (6.4 mm) to the page height.
2. If the pages are already sized for bleed, make sure you extend any images and backgrounds that you want to reach all the way to the edge of the page at least 0.125” (3.2 mm) beyond the trim line. This prevents white gaps along the outside edge(s) when the file is trimmed to size.
3. If there is content that is not intended to bleed, please ensure it stops within the margins, 0.375" (9.5 mm) or more from any outside edge of the page.