delete existing errors before bulk upload run

app/services/bulk_upload/processor.rb

@@ -6,6 +6,8 @@ class BulkUpload::Processor
   end
 
   def call
+    destroy_any_existing_errors_from_prior_run
+
     download
 
     return send_failure_mail(errors: validator.errors.full_messages) if validator.invalid?
@@ -46,6 +48,10 @@ class BulkUpload::Processor
 
 private
 
+  def destroy_any_existing_errors_from_prior_run
+    bulk_upload.bulk_upload_errors.destroy_all
+  end
+
   def send_how_to_fix_upload_mail
     BulkUploadMailer
       .send_how_to_fix_upload_mail(bulk_upload:)

spec/services/bulk_upload/processor_spec.rb

@@ -8,6 +8,16 @@ RSpec.describe BulkUpload::Processor do
   let(:owning_org) { create(:organisation, old_visible_id: 123) }
 
   describe "#call" do
+    context "when errors exist from prior job run" do
+      let!(:existing_error) { create(:bulk_upload_error, bulk_upload:) }
+
+      it "destroys existing errors" do
+        processor.call
+
+        expect { existing_error.reload }.to raise_error(ActiveRecord::RecordNotFound)
+      end
+    end
+
     context "when the bulk upload itself is not considered valid" do
       let(:mock_downloader) do
         instance_double(