Prestashop, changing configuration e-mail

I have changed the name of my shop in Preferences / Contact and shops, there is nothing to do, these values ​​do not change. I enter again and the old values come back again.

I was reviewing the php file and I found that the configuration values that where not working was: PS_SHOP_EMAIL.

I accessed to the database and on the ps_configuration table, I saw that the values for this key was duplicated. I have removed the duplicated value and now it is working fine.