Unable to play empty soundEvent: minecraft:music.nether.warped_forest

The bug

New nether musics has been added in 20w15a but there is one missing and unused music for the warped forest.

How to reproduce

Run:

/playsound minecraft:music.nether.warped_forest music @s

→ This sound is missing and unused and you get this message in the game output:

Unable to play empty soundEvent: minecraft:music.nether.warped_forest