Of this function the "History" file creates again. She contains the Message-IDs of all articles and prevents with it the repeated shop of the same article.

A new production is meaningful only if the recognition should do suddenly mistake or one comes by losses in a group file to the embarrassment to have to get several Postings still the second time.

If one has prescribed a low preservation time (few days for the groups), it is also with a new-produced History absolutely likely that separate articles arrive twice, because the first article was not already any more in the group file and could not be inserted therefore also his(its) Message-ID any more in the History.

Respect: the production of this file can substantially take up time.