sumire_(pixiv142558) and its corresponding artist page should be deleted. The artist is now known as ビオラ (Viola), so the tag viola_(artist) should replace all pictures currently tagged with sumire_(pixiv142558).

Here's relevant info for the new artist page:

Japanese name: ビオラ (formerly known as スミレ and 凡歐菈)
Pixiv account: http://www.pixiv.net/member.php?id=142558

一声 said:
The artist is now known as ビオラ (Viola), so the tag viola_(artist) should replace all pictures currently tagged with sumire_(pixiv142558)

I don't like using the "_(artist)" qualifier. How about "viola_(seed)" instead, after the pixiv URL?

RaisingK said:
I don't like using the "_(artist)" qualifier. How about "viola_(seed)" instead, after the pixiv URL?

The only problem with that is http://img12.pixiv.net/img/seed1yet/ doesn't redirect to her current pixiv profile.

It never has and probably never will, any other issues?

Aliased to viola_(seed).