Maria Callas’ recordings of various Ponchielli operas are very mixed up.
The recording of Ponchielli’s I Pagliacci by Callas and Serafin in 1954 appears as a version of Ponchielli’s La Gioconda.
For La Gioconda itself Callas and Serafin’s 1954 is lumped with Callas and Votto’s 1959 version and Callas and Votto’s 1952 recording.
Are all of these albums identified?
Yes. Tidal has also scrambled up its recordings, but not sure if this is due to Roon or not.
For Gioconda it looks like there is something going on with Roon’s metadata providers.
The 1952 recording is on Duscogs, it was issued in 1954 apparently: https://www.discogs.com/Amilcare-Ponchielli-Maria-Callas-Maria-Amadini-Fedora-Barbieri-Gianni-Poggi-Paolo-Silveri-Giulio-Ner/master/859363
The recent SACD issued of this recording has the same artwork as the original LP.
The 1959 version had a different cast and orchestra. It is for sale here: https://www.prestomusic.com/classical/products/8046711--ponchielli-la-gioconda and here: https://www.amazon.com/Ponchielli-Gioconda-Votto-Callas-Remastered/dp/B00KTQD80O
and on Discogs here: https://www.discogs.com/Maria-Callas-Amilcare-Ponchielli-Fiorenza-Cossotto-Ivo-Vinco-Irene-Companeez-Pier-Miranda-Ferraro-Pi/master/909113 The artwork for the 1952 recording on Roon is actually the artwork for the 1959 recording: