Why am I getting duplicate messages on RSS groups?

Nasser Alkmim <[email protected]>
Newsgroups gmane.emacs.gnus.general
Message-ID <[email protected]> 
Hi,

Not sure how to debug this situation, but some RSS feeds that I have in groups end up with duplicate messages.

I use this "five filters full-text RSS" to extract the full text from some RSS feeds, and it has a limit of 3 items per feed and 12-hours refresh rate.
Maybe after this 12-hours, the messages are obtained again.

The duplicate messages have different "Message-ID", but same subject/date and everything else.

Any ideas?

-- 
Nasser Alkmim
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