can someone tell me why Dahyun was not supposed to mention Alcohol-Free in her bday vlive?

The name of the title track had not been released yet at that point. All we knew was the release date. So it's a spoiler as to what the name was.

Quote from booople

Oh really? thanks. that makes sense.

I thought it had been announced since it was just 10 days before the release.

Nah, the teaser cycle was very different this time around. We didn't get the tracklist until about a week before the release.

Or, the belief about you can't say your wishes out loud or it won't happen. I don't know any country other than Korea holding this belief. Mina doesn't know either