Suddenly getting this: SQLite error cannot commit - no transaction is active

[drwtsn32]

I see you’ve opted to start over, but just in case here is another thread mentioning this issue, and the root cause was lack of free space on the filesystem hosting the sqlite database:

Large backups failing with "SQLite error cannot commit - no transaction is active"

This happened to me when the disk that’s hosting the .sqlite file ran out of space. Extending my partition (it was a VM backing up a large externally connected disk so I didn’t give the OS much room) fixed the problem.