Batch Update the current relationship in CiviCRM
I used contact_id_a and contact_id_b and relationship_type id and set the is_active to 0 in csv file. But this extension gives me an error "Error with entity "create"! (Duplicate Relationship)".


Seems like you have relationship_type_id but not relationship id in the CSV file? If yes, I think you just need to add Relationship id to the columns.

The id is used by civicrm to update the records in the database instead of creating a new one.

Hence, try adding a new column in CSV and then proceed with the import.