Empty deluge field name (problem with cyrillic)

Empty deluge field name (problem with cyrillic)

I'm create field in the form (date type), and fill the name of field using cyrillic character.
ZC automatically assign cyrillic name to field deluge name and save changes  ...
After that I have no access to this field, I can't backup app, I can't download app to my computer.
In form definition it looks like empty name:


        ""
        (
            displayname  =  "Дата выполнения"
            type  =  date
            width  =  130px
            alloweddays = 0,1,2,3,4,5,6
        )

but i can't change this line too.
Error modifying the page
null
Please help!
App zoho_user266/press/ shared to service support, Form deluge name - Tickets, Form name - "Задача"