Label existing host with label from CSV

@okin I am facing similar issue as mentioned above.I am trying to create a label ( not tag ) for the hostname at the time of csv import however dont seem to get it in the properties of the host and rather inherits the one at the folder level.

My goal ultimately is to add the custom information in the email , tried asking it in Custom attribute in notification email - #2 by atulchadha24

Also, is there a setting to allow overwriting the existing hosts. I am on version 2.0.11 CRE. Thanks in advance.

CSV Data

host;SERIAL
dummy_host;XYXYXYXYX