Change email through MySQL

Hello! Faced such a problem. There is a site with the name sait.ru in which there are about 50 forms, in each form the mail of [email protected] is indicated, I transferred the site to another domain and I want to massively change mail through the database for example to [email protected], when I change just disappear all the fields in the form. Help, can anyone come across?

The page I need help with: [log in to see the link]