diff --git a/app/importers/modular_importer.rb b/app/importers/modular_importer.rb
index 5fda3a4..a4c1f7d 100644
--- a/app/importers/modular_importer.rb
+++ b/app/importers/modular_importer.rb
@@ -35,7 +35,7 @@ def import
     importer = Zizia::Importer.new(parser: Zizia::CsvParser.new(file: file), record_importer: Zizia::HyraxRecordImporter.new(attributes: attrs))
 
     importer.records.each_with_index do |record, index|
-      pre_ingest_work = Zizia::PreIngestWork.new(csv_import_detail_id: csv_import_detail.id)
+      pre_ingest_work = Zizia::PreIngestWork.new(csv_import_detail_id: csv_import_detail.id, deduplication_key: record.mapper.metadata["deduplication_key"])
 
       record.mapper.files.each do |child_file|
         full_path = Dir.glob("#{ENV['IMPORT_PATH']}/**/#{child_file}").first
diff --git a/db/migrate/20191031131041_add_deduplication_key_to_pre_ingest_work.rb b/db/migrate/20191031131041_add_deduplication_key_to_pre_ingest_work.rb
new file mode 100644
index 0000000..8bf7363
--- /dev/null
+++ b/db/migrate/20191031131041_add_deduplication_key_to_pre_ingest_work.rb
@@ -0,0 +1,6 @@
+class AddDeduplicationKeyToPreIngestWork < ActiveRecord::Migration[5.1]
+  def change
+    add_column :zizia_pre_ingest_works, :deduplication_key, :string
+    add_index :zizia_pre_ingest_works, :deduplication_key
+  end
+end
diff --git a/spec/dummy/db/schema.rb b/spec/dummy/db/schema.rb
index 9fc173c..2a13872 100644
--- a/spec/dummy/db/schema.rb
+++ b/spec/dummy/db/schema.rb
@@ -602,7 +602,9 @@
     t.integer "csv_import_detail_id"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.string "deduplication_key"
     t.index ["csv_import_detail_id"], name: "index_zizia_pre_ingest_works_on_csv_import_detail_id"
+    t.index ["deduplication_key"], name: "index_zizia_pre_ingest_works_on_deduplication_key"
   end
 
 end
diff --git a/spec/dummy/spec/fixtures/csv_import/good/all_fields.csv b/spec/dummy/spec/fixtures/csv_import/good/all_fields.csv
index 5e4e505..acef762 100644
--- a/spec/dummy/spec/fixtures/csv_import/good/all_fields.csv
+++ b/spec/dummy/spec/fixtures/csv_import/good/all_fields.csv
@@ -1,2 +1,2 @@
-identifier,license,visibility,location,keyword,rights statement,creator,title,files
-abc/123,https://creativecommons.org/licenses/by/4.0/,PUBlic,http://www.geonames.org/5667009/montana.html|~|http://www.geonames.org/6252001/united-states.html,Clothing stores $z California $z Los Angeles|~|Interior design $z California $z Los Angeles,http://rightsstatements.org/vocab/InC/1.0/,"Connell, Will, $d 1898-1961","Interior view of The Bachelors haberdashery designed by Julius Ralph Davidson, Los Angeles, circa 1929",dog.jpg
+identifier,license,deduplication_key,visibility,location,keyword,rights statement,creator,title,files
+abc/123,https://creativecommons.org/licenses/by/4.0/,abc/123,PUBlic,http://www.geonames.org/5667009/montana.html|~|http://www.geonames.org/6252001/united-states.html,Clothing stores $z California $z Los Angeles|~|Interior design $z California $z Los Angeles,http://rightsstatements.org/vocab/InC/1.0/,"Connell, Will, $d 1898-1961","Interior view of The Bachelors haberdashery designed by Julius Ralph Davidson, Los Angeles, circa 1929",dog.jpg
diff --git a/spec/dummy/spec/fixtures/csv_import/good/all_fields_complete_update.csv b/spec/dummy/spec/fixtures/csv_import/good/all_fields_complete_update.csv
index 614e810..0c0ae5a 100644
--- a/spec/dummy/spec/fixtures/csv_import/good/all_fields_complete_update.csv
+++ b/spec/dummy/spec/fixtures/csv_import/good/all_fields_complete_update.csv
@@ -1,2 +1,2 @@
-identifier,license,visibility,location,keyword,rights statement,creator,title,files
-abc/123,https://creativecommons.org/licenses/by/4.0/,PUBlic,http://www.geonames.org/5667009/montana.html|~|http://www.geonames.org/6252001/united-states.html,Clothing stores $z California $z Los Angeles|~|Interior design $z California $z Los Angeles,http://rightsstatements.org/vocab/InC/1.0/,"Connell, Will, $d 1898-1961","Interior view of The Bachelors haberdashery designed by Julius Ralph Davidson, Los Angeles, circa 1929",cat.jpg
+identifier,license,deduplication_key,visibility,location,keyword,rights statement,creator,title,files
+abc/123,https://creativecommons.org/licenses/by/4.0/,abc/123,PUBlic,http://www.geonames.org/5667009/montana.html|~|http://www.geonames.org/6252001/united-states.html,Clothing stores $z California $z Los Angeles|~|Interior design $z California $z Los Angeles,http://rightsstatements.org/vocab/InC/1.0/,"Connell, Will, $d 1898-1961","Interior view of The Bachelors haberdashery designed by Julius Ralph Davidson, Los Angeles, circa 1929",cat.jpg
diff --git a/spec/dummy/spec/fixtures/csv_import/good/all_fields_metadata_update.csv b/spec/dummy/spec/fixtures/csv_import/good/all_fields_metadata_update.csv
index da1ad47..b4af81a 100644
--- a/spec/dummy/spec/fixtures/csv_import/good/all_fields_metadata_update.csv
+++ b/spec/dummy/spec/fixtures/csv_import/good/all_fields_metadata_update.csv
@@ -1,2 +1,2 @@
-identifier,license,visibility,location,keyword,rights statement,creator,title,files
-abc/123,https://creativecommons.org/licenses/by/4.0/,PUBlic,http://www.geonames.org/5667009/montana.html|~|http://www.geonames.org/6252001/united-states.html,Clothing stores $z California $z Los Angeles|~|Exterior design $z California $z Los Angeles,http://rightsstatements.org/vocab/InC/1.0/,"Connell, Will, $d 1898-1961","Exterior view of The Bachelors haberdashery designed by Julius Ralph Davidson, Los Angeles, circa 1929",dog.jpg
+identifier,license,deduplication_key,visibility,location,keyword,rights statement,creator,title,files
+abc/123,https://creativecommons.org/licenses/by/4.0/,abc/123,PUBlic,http://www.geonames.org/5667009/montana.html|~|http://www.geonames.org/6252001/united-states.html,Clothing stores $z California $z Los Angeles|~|Exterior design $z California $z Los Angeles,http://rightsstatements.org/vocab/InC/1.0/,"Connell, Will, $d 1898-1961","Exterior view of The Bachelors haberdashery designed by Julius Ralph Davidson, Los Angeles, circa 1929",dog.jpg
diff --git a/spec/dummy/spec/fixtures/csv_import/good/all_fields_only_new.csv b/spec/dummy/spec/fixtures/csv_import/good/all_fields_only_new.csv
index 3f9b4c8..6aaf299 100644
--- a/spec/dummy/spec/fixtures/csv_import/good/all_fields_only_new.csv
+++ b/spec/dummy/spec/fixtures/csv_import/good/all_fields_only_new.csv
@@ -1,3 +1,3 @@
-identifier,license,visibility,location,keyword,rights statement,creator,title,files
-abc/123,https://creativecommons.org/licenses/by/4.0/,PUBlic,http://www.geonames.org/5667009/montana.html|~|http://www.geonames.org/6252001/united-states.html,Clothing stores $z California $z Los Angeles|~|Interior design $z California $z Los Angeles,http://rightsstatements.org/vocab/InC/1.0/,"Connell, Will, $d 1898-1961","Interior view of The Bachelors haberdashery designed by Julius Ralph Davidson, Los Angeles, circa 1929",dog.jpg
-abc/456,https://creativecommons.org/licenses/by/4.0/,PUBlic,http://www.geonames.org/5667009/montana.html|~|http://www.geonames.org/6252001/united-states.html,Clothing stores $z California $z Los Angeles|~|Interior design $z California $z Los Angeles,http://rightsstatements.org/vocab/InC/1.0/,"Connell, Will, $d 1898-1961","Interior view of The Bachelors patisserie designed by Julius Ralph Davidson, Los Angeles, circa 1929",cat.jpg
+identifier,license,deduplication_key,visibility,location,keyword,rights statement,creator,title,files
+abc/123,https://creativecommons.org/licenses/by/4.0/,abc/123,PUBlic,http://www.geonames.org/5667009/montana.html|~|http://www.geonames.org/6252001/united-states.html,Clothing stores $z California $z Los Angeles|~|Interior design $z California $z Los Angeles,http://rightsstatements.org/vocab/InC/1.0/,"Connell, Will, $d 1898-1961","Interior view of The Bachelors haberdashery designed by Julius Ralph Davidson, Los Angeles, circa 1929",dog.jpg
+abc/456,https://creativecommons.org/licenses/by/4.0/,abc/456,PUBlic,http://www.geonames.org/5667009/montana.html|~|http://www.geonames.org/6252001/united-states.html,Clothing stores $z California $z Los Angeles|~|Interior design $z California $z Los Angeles,http://rightsstatements.org/vocab/InC/1.0/,"Connell, Will, $d 1898-1961","Interior view of The Bachelors patisserie designed by Julius Ralph Davidson, Los Angeles, circa 1929",cat.jpg
diff --git a/spec/factories/pre_ingest_work.rb b/spec/factories/pre_ingest_work.rb
index 348cad6..dab72c6 100644
--- a/spec/factories/pre_ingest_work.rb
+++ b/spec/factories/pre_ingest_work.rb
@@ -6,5 +6,6 @@
     created_at { Time.current }
     updated_at { Time.current }
     csv_import_detail_id { 1 }
+    sequence(:deduplication_key) { |n| "zyx321cba#{n}" }
   end
 end
diff --git a/spec/models/zizia/csv_import_detail_spec.rb b/spec/models/zizia/csv_import_detail_spec.rb
new file mode 100644
index 0000000..5ef2e94
--- /dev/null
+++ b/spec/models/zizia/csv_import_detail_spec.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+require 'rails_helper'
+
+RSpec.describe Zizia::CsvImportDetail do
+  it 'can instantiate' do
+    cid = described_class.new
+    expect(cid.class).to eq described_class
+  end
+end
diff --git a/spec/models/zizia/pre_ingest_work_spec.rb b/spec/models/zizia/pre_ingest_work_spec.rb
new file mode 100644
index 0000000..e05cb7c
--- /dev/null
+++ b/spec/models/zizia/pre_ingest_work_spec.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+require 'rails_helper'
+
+RSpec.describe Zizia::PreIngestWork do
+  let(:pre_ingest_work) { FactoryBot.create(:pre_ingest_work, deduplication_key: "42") }
+  it 'has a deduplication_key' do
+    expect(pre_ingest_work.deduplication_key).to eq "42"
+  end
+end