Yes, this was other issue of mine I had 5 mesh from fab, I test it by migrating whole project to new project and remove them. Once they were removed state of ready-only file was gone. Now having issue cannot save 
Yes, this was other issue of mine I had 5 mesh from fab, I test it by migrating whole project to new project and remove them. Once they were removed state of ready-only file was gone. Now having issue cannot save