Unable to Update the Field in View

Created a Z table with a field with drop down values. Generated a view for this table. I am able to update the table with the values in the drop down.

Later , I removed the drop down list of the field in the table. But the View is not updated and the field is still showing a drop down while trying to update with the values in Sm 30 manually. And there are no values in the drop down. Tried by adjusting the table in SE14 . But still getting the same problem.