fix completed submitters

app/jobs/process_submitter_completion_job.rb

@@ -6,6 +6,8 @@ class ProcessSubmitterCompletionJob
   def perform(params = {})
     submitter = Submitter.find(params['submitter_id'])
 
+    create_completed_submitter!(submitter)
+
     is_all_completed = !submitter.submission.submitters.exists?(completed_at: nil)
 
     if !is_all_completed && submitter.submission.submitters_order_preserved?
@@ -24,7 +26,7 @@ class ProcessSubmitterCompletionJob
       enqueue_completed_emails(submitter)
     end
 
-    create_completed_submitter!(submitter)
+    create_completed_documents!(submitter)
 
     enqueue_completed_webhooks(submitter, is_all_completed:)
   end
@@ -45,15 +47,19 @@ class ProcessSubmitterCompletionJob
       completed_at: submitter.completed_at
     )
 
-    submitter.documents.each do |attachment|
-      next if attachment.metadata['sha256'].blank?
-
-      completed_submitter.completed_documents << CompletedDocument.new(sha256: attachment.metadata['sha256'])
-    end
-
     completed_submitter.save!
 
     completed_submitter
+  rescue ActiveRecord::RecordNotUnique
+    retry
+  end
+
+  def create_completed_documents!(submitter)
+    submitter.documents.filter_map do |attachment|
+      next if attachment.metadata['sha256'].blank?
+
+      CompletedDocument.find_or_create_by!(sha256: attachment.metadata['sha256'], submitter_id: submitter.id)
+    end
   end
 
   def enqueue_completed_webhooks(submitter, is_all_completed: false)