My Condo as been removed (windows update 2004)

hey so i worked on my Highrise build and i did a lot of things i spend time 25+ hours and i didnt play for one week something like that and i did a windows update to windows version 2004 and i right now i opened tower unite to contuine my condo and when i join the game i sew everything has diffult i mean like all what i did in the condo has just been gone so can someone tell me why its happend?

Thanks For Answers.