I tried many ways.
First, I moved all files and folders in Content folder. But when I open the project all building's light was gone.
And for second I tried using migrate, but the result was same.
And there are some warnings, but I wouldn't solve this problem alone..
Anyone knows about this??
I solved this! I was migrate only level, but there was a warning message that can't recognize wall material so I migrate this material too. NOT export!