Update Existing Content

Problem/Motivation

I am trying to update already existing content in my project. When I upload the csv it wipes out the contents of fields that are either left blank in csv or the field which is not added in csv. Is there any way by which I can update just the fields that I provide in csv without altering other fields.

Steps to reproduce

Installed the module and selected update existing content option under import type. Added the field's machine name as row header.