Is it possible to remove attributes of a classification in Atlas?

[#1]

I am using Atlas of Sandbox HDP3.0.

Currently, I have an issue that can not remove attributes of a classification in Atlas It seems that it only way to modify the attribute is to delete the classification and recreate a new one. However, it would affected all the entities with the same classification tag.

Unable to modify the ssn attribute via the AtlasUI.