There are no such fields even in osclass, I think you little bit panic.
Before any upgrade you should backup files and databse. After upgrade you validate if everything works properly.
In case of some issues, you revert back using backups.
To avoid any problems with production websites, you have copy on some testing subdomain where you can validate upgrade if working properly.
Yrt you have not even shown how problem can be reproduced, what is your url, what message ate you getting, if upgrade finished without any issues...