Hyosung � Sulli, Playboy, why did it change their names?

Apparently the Korean Playboy featuredSullion its covers and interviewed her for its first issue. SM is denying this.

In fact, the interview thatSulli'apparently' had with Playboy was actually singerHyosungwho interviewed with a different magazine in the past.

Playboy Korea explained, "There was a mistake in the process of reviewing the issue of the first book". NeitherSullinor Hyo-seong interviewed for it.

However, the interview saysSulliinstead ofHyosungand f(x) instead of Secret.

Responsible sources weren't available for an explanation on this.