Happened to me on live distro:

```console
# dnf --setopt=cachedir=/tmp/dnfcache remove somepackage
Loading system state TOML file /usr/lib/sysimage/libdnf5/nevras.toml failed (see dnf5-system-state(7)): [error] bad format: unknown value appeared
 --> /usr/lib/sysimage/libdnf5/nevras.toml
      |
 1669 | ... -3.fc41.x86_64" = {from_repo =
      |                                   ^-- here
[error] toml::parse_inline_table: missing closing bracket `}`
 --> /usr/lib/sysimage/libdnf5/nevras.toml
      |
 1669 | ... -3.fc41.x86_64" = {from_repo =
      |                                   ^-- expected `}`, reached line end
```

Apparently, it is vital for that file to always be in consistent
state, written in full or not at all/former version retained.

This situation is also likely not solvable by the means of dnf
proper such as with a subcommand to reconcile the state, or even
with some automatic resolution (consult RPM DB?).

Reproducible: Always




Additional Information:
```console
# rpm -qf /usr/lib/sysimage/libdnf5/nevras.toml
dnf5-5.2.11.0-1.fc43.x86_64
```