Comment 65 for bug 1945368

I don't know if it can help, but here's a screenshot of my calendar-data/ files right now (upgraded from 78 to 91 and I can't view local calendar events): https://i.imgur.com/DQ6153V.png

\calendar-data\local.sqlite
\calendar-data\local.sqlite-shm
\calendar-data\local.sqlite-wal
\calendar-data\backup\local.v22.sqlite

I thought that maybe my lost events was in the backup\local.v22.sqlite file but it looks like very similar to the actual \calendar-data\local.sqlite