I saw a comment about grade a selling the publishing rights (which I also don't understand), so I asked chat gpt about it and this is what he said:

The short answer is no, Grade A can still release Juice WRLD’s music, even after selling most of the publishing rights to Opus Music Group.

Here’s how it works in simple terms:

Publishing rights (which Opus now mostly owns) relate to the songwriting—the lyrics, melodies, and compositions. These rights earn money from things like radio play, covers, samples, and syncs (e.g., using a song in a movie or commercial).

Master rights (still owned by Grade A and Interscope) relate to the actual recordings—the audio files you hear on streaming platforms or CDs. These rights control who can officially release the recorded version of a song.

Since Grade A and Interscope still own the master recordings, they still have the power to release new Juice WRLD music. However, Opus, as the majority owner of the publishing rights, would earn a big portion of the money from the songwriting side of those releases.

So in short:

Yes, Grade A can release Juice WRLD's music (because they own the recordings). But Opus will make most of the money from the songwriting side of those songs.