Hi Aris, Out of the columns that can be made null, only some of the columns facilitate nullifying a value with grid editing. For example, while columns rating and special_features of sakila.film can be made null with grid editing, release_year and length of the same table cannot be made null. I feel it would be better if the behavior is consistent among all the columns that can be made null. -- Thanks and Regards, Madhura Jayaratne