Question about *.blog.me and blog.naver.com/* URLs

A problem came up in a webpage where there exist *.blog.me and blog.naver.com/* URLs at the same time. Today I was trying to prefix a *.blog.me URL with - to mark it as dead (https://danbooru.donmai.us/artists/85696), but it didn't work as expected. Instead of presenting a red *.blog.me URL on the webpage, it automatically deleted the *.blog.me URL and changed the color of blog.naver.com/* URL into red.

I tried to fix it by reverting it to the last version, but it didn't work as expected either. The deleted *.blog.me URL didn't come back, but the red blog.naver.com/* URL did become blue again. I tried the same action on an other artist page, and got the same result (https://danbooru.donmai.us/artists/81347).

I don't know the history of blog.me and blog.naver.com, but I guess they're the same website and the problem comes up when the system tries to automatically convert a *.blog.me URL to a blog.naver.com/* URL.

It looks like that, while usernames are still extracted from *.blog.me URLs, the normalized format always uses blog.naver.com/*.

I believe this has the effect that trying to add (or modify) a link in the old format treats it as if it's the same URL and merges them, leading to this slightly unexpected behavior. I'm not sure whether this is intentional though, since it makes it impossible to add a *.blog.me* URL, but if it's discontinued that may not be a an issue.