How confusing to be talking about one kind of journal inside of a collaborative happening making another kind of journal.
When people write down what happened they call that keeping a journal. Its a good thing for historians.
When computer programs write down what happened they might call this a journal too.
Federated wiki keeps a journal of every edit action at the bottom of every page. Its a good thing too.
Collaborators will find the journal handy for making sense of what's happening in the community.
Developers will find the journal handy too when they get to studying Reported Errors.