Hi @YoavE
You have ended up with a corrupted H2 database.
Try following the troubleshooting. It's not written for Windows, so you'll need to adjust yourself:
https://www.metabase.com/docs/latest/troubleshooting-guide/loading-from-h2.html#is-the-app-database-corrupted
Hopefully you'll be able to recover, otherwise you have to revert to your latest backup.
Also worth reading: Update from 0.37 to .40.5 corrupted database
And several other topics about the same problem with a corrupted H2: https://discourse.metabase.com/search?q=corrupted%20h2%20order%3Alatest
After you have (hopefully) recovered, then migrate away from H2, which should not be used in production:
https://www.metabase.com/docs/latest/operations-guide/migrating-from-h2.html