Musical is not an available genre. Please, read here.

i don't understand in the links you put there is this

NOTE The "Music" genre should only be used for concerts, music documentaries and any films in which music is a key plot element. The "musical" keyword should be used for musical films.

so the movie are music or musical ? thank you

Well, basically we do not have a Musical genre, so we can't do what you're requesting.

Music, which we do have, is for films where music is central element to the plot (e.g. a singer biopic)