We had a old property in one of page type called "AuthorName" (we are using EPiServer 8.1)

[Display(Name = "Author Name",
Description = "Author Name",
Order = 40,
GroupName = SystemTabNames.Content)]
public virtual string AuthorName { get; set; }

Now requirements were changed and we changed the "Name" and "Description" of it as:

[Display(Name = "Written By",
Description = "Written By",
Order = 40,
GroupName = SystemTabNames.Content)]
public virtual string AuthorName { get; set; }

But, in the edit mode that change was not reflecting

But in the property setting, I can see the change

I did "Revert to Default" in both type and the property as well. But neither were worked

So, how could I correct this ?