SEE ALSO: YG Entertainment girl group rumored to debut in November

According to music insiders in an exclusive by Ilgan Sports, Kim Eun Bi was revealed to have left the group 6 months ago due to health issues.

A YG rep told the media outlet, "It is true. It is very regretful that a friend, who trained with us for a long time, has left without fulfilling her dream. It was decided that her [future] activities would put too much stress on her health."

The rep continued, "It is true that the debut album is close to the final stages of production. The new girl group will debut in November at the earliest and within this year at the latest."

Kim Eun Bi joined YG Entertainment along with fellow 'Superstar K2' contestant WINNER's Kang Seung Yoon in 2011. With Kim Eun Bi gone, only two members previously introduced of the new girl group including Kim Jisoo (19) and Jennie Kim (18) remain confirmed as of the time being.

Stay tuned for any updates that may come.