Multiple aliases in indexTags

[Gdg]

Hello everybody, new user from Italy here.
I have a question I couldn't answer by myself, since I'm new to minimServer

I would like setting up multiple folders to list songs by all genre AND filtered by some specifical genre.
E.g.:

• AllGenre
  • Ambient
  • Classical
  • Dance
  • Rock
    
• RockGenre
  • Rock
    
• DanceGenre
  • Dance
    

Doing like this works fine for one entry only:
* indexTags=...,Genre=Rock:RockGenre,...

But for two or more
* indexTags=...,Genre=Rock:RockGenre,Genre=Dance:DanceGenre,...
I got the error: "MinimServer: duplicate index tag name 'Genre'"

So, is there any way to do the above?

Thank you for your patience and help.