it's a spin-off of the series like other spin-offs (The Blacklist: Redemption) I think they should have a new tv entry (https://www.themoviedb.org/tv/68018-the-blacklist-redemption?language=de-DE)

I have nothing against the fact it is listed separately.

My concern is the fact that it is currently listed 2 times : separately AND as special episodes in the main serie.

To take the same example as you : "The Blacklist: Redemption" is only separately and doesn't appear in the specials of "The Blacklist".

so I think it should be deleted as specials

No problem for me. And shouldn't we do the same with the 2 other spin-off : "Double Agent" and "Academy" ?

Can you give us links to the other entries?

They are currently only listed as specials in the "Marvel's Agents of S.H.I.E.L.D." : https://www.themoviedb.org/tv/1403-marvel-s-agents-of-s-h-i-e-l-d/season/0?language=en-US (episodes 3 to 7 for "Double Agent" and episodes 14 to 18 for "Academy"). If we list "Slingshot" (specials 8 to 13) separatelu, I think we should also list them separately.

"Agents of S.H.I.E.L.D.: Double Agent" is described here : https://marvelcinematicuniverse.fandom.com/wiki/Agents_of_S.H.I.E.L.D.:_Double_Agent and "Agents of S.H.I.E.L.D.: Academy" is described here : https://marvelcinematicuniverse.fandom.com/wiki/Agents_of_S.H.I.E.L.D.:_Academy

This maybe a different thing, I wait for other opinions now

it's a spin-off of the series like other spin-offs (The Blacklist: Redemption) I think they should have a new tv entry (https://www.themoviedb.org/tv/68018-the-blacklist-redemption?language=de-DE)

I don't think it's a fair comparison. The Blacklist: Redemption is a proper television series. Slingshot is a short web series set in the world of Agents of S.H.I.E.L.D. I do agree with you though. I think it is fine as stand-alone entry though because a) it has its own page on the ABC website and b) it has proper credits.

The same can't be said for Double Agent and Academy. I would prefer to keep these two in the specials.