Sans Souci Building - what’s going on?

The price histories on Zillow have dropped on these like crazy over the past year. This one alone went from $1.7M to 390k. Anyone know what’s going on there?

https://www.zillow.com/homedetails/2877-Kalakaua-Ave-503504-Honolulu-HI-96815/2053279279_zpid/?utm_campaign=iosappmessage&utm_medium=referral&utm_source=txtshare