enum @map value

I have this enum mapping but it doesn't generate the same value instead it uses the key as the value.

enum Gender {
  MALE   @map("M")
  FEMALE @map("F")
}

enum Gender {
  MALE   @map("M")
  FEMALE @map("F")
}

enum Gender {
  MALE   @map("M")
  FEMALE @map("F")
}

enum Gender {
  MALE   @map("M")
  FEMALE @map("F")
}