Based on a reply by one of the other mappers, I am starting to see that the significance of Asturias is that it is the first one in the editor suggestions list in alphabetical order. Trying to avoid that with a not: tag probably just pushes it to the next on the list, which is Cadiz.

I'm not sure if this reflects something wrong with the data used in the name suggestion index for Spanish train networks specifically, or a more global issue in the way the index is used.