Is it possible to update a saga after receiving an event without a transition to a new state?

I tried this, but it failed due to some kind of recursive problem:

During(CalculateStarted,
    When(CalculateLogMessage)
        .Then(context => context.Saga.Logs.AddRange(context.Message.Logs))
);

My intention is to save the logs of a long-running external process in the saga.
The only other option I know of is to use a consumer that stores these events in the database.