In SharePoint 2010 I have a modified List based on the default Contact template with additional Columns using a custom Content Type "Modified Contact List"; in Content Type, the only Column set to be required is theStaff Name of Person or Group Type, and default Last Name column has been set toOptional.
While the adding a new item from web New Form requires only Staff Name field to be filled, however when in Datasheet View it still promptLast Name as a required column:
Is this a bug or there are some hidden settings for Datasheet View?