Fix SQLite error "unknown database fourcc" VACCUM either needs no argument, or a schema name of an attached database since SQLite 3.15. "fourcc" is neither, the database name is "main". . From https://sqlite.org/lang_vacuum.html: . Compatibility Warning: The ability to vacuum attached databases was added in version 3.15.0 (2016-10-14). Prior to that, a schema-name added to the VACUUM statement would be silently ignored and the "main" schema would be vacuumed.
