Gwene says feed is already subscribed, but it's not in the newsgroups list

Hello everyone,

This is my first post on Usenet, I hope everything would go well.

I'm trying to add RSS feed to Gwene, but is seems that it's already
there.

Quoting news.gwene.org
"This feed
(https://www.youtube.com/feeds/videos.xml?channel_id=UCYO_jab_esuFRV4b17AJtAw)
is already subscribed as
gwene.com.youtube.feeds.videos.xml.channel.id.ucyo.jab.esu
(https://www.youtube.com/feeds/videos.xml?channel_id=UCYO_jab_esuFRV4b17AJtAw).
"

I don't see such field in the Gwene newsgroups list. Is it empty for
some reason? If it's working how can I subscribe it?

Best wishes,
Yaroslav