I get this message from time to time.
I just compact my file, reboot my machine and move on.
It's never caused a problem for me, except that it repeats maybe once a week or once a month.
I tried exporting my file and re-importing once (like the message suggests) and that process deleted some media items, so I don't do that anymore. You can try it and see if it works for you. Check file size, no. of people, no. of media items, no. of sources and no. of marriages to see if any changes, though.
I just compact my file, reboot my machine and move on.
It's never caused a problem for me, except that it repeats maybe once a week or once a month.
I tried exporting my file and re-importing once (like the message suggests) and that process deleted some media items, so I don't do that anymore. You can try it and see if it works for you. Check file size, no. of people, no. of media items, no. of sources and no. of marriages to see if any changes, though.