Just wanted to add, I have the saw database disk image malformed issue twice now.
Unfortunately, I did no know what version I went to initially, I am guessing it was from v1.30.0 to v2.0.9. After I found the issues, I now specify my docker version tags and tried to again with a new migration a few weeks back. The migration went fine and I could access the UI. I thought all was good but sometime after then it failed again with a database disk image malformed. I did not find it until today (Syncthing used to be very hands off).
Today, I am using the steps to re-migrate the old database here - Problems after upgrade to v2.0.2 - #4 by cvanelli - and now trying to go directly to v2.0.10 with another migration from v1.