I still have the error about division by zero (that's what happens when you finish a book the last day of the year
). And migration has worked for me... in a way. Books have been copied from 2023 to 2024, and I have had to remove them manually from 2023. I guess that, when you finish a book, it's removed from both years, but I'm not going to test it (I've already removed 2023 entries).