How do I change the Attribute on the Armor?

I got the Twilight Set but just realized the Attribute set-up is not
what I wanted.
I want 3 x 60 dark, 3 x 60 earth
but instead, the set has 3 x 60 holy, 3 x 60 wind...

Is there a way to change the Attributes on the armor?
If so, can I just change 60 x Holy to 60 x dark and leave the other attributes
on the same armor unchanged? or do they all get reset and I gotta start them again
from scratch? from 0?