Shelf "civil war navy"

[Jimmy]

* https://www.goodreads.com/genres/amer...
It looks like the tag/shelf/genre above simply re-directs to, and is merged with, the American Civil War genre. Is there any way for the Civil War Navy tag to be changed into one of the related genres/sub-genre of the main ACW shelf?

[Paula]

Remove duplicate off American Civil War which is causing redirect, not linking to Sub of American Civil War as Civil War navy can relate to non American wars