update logging

app/services/imports/sales_logs_import_service.rb

@@ -493,7 +493,7 @@ module Imports
 
     def missing_answers(sales_log)
       applicable_questions = sales_log.form.subsections.map { |s| s.applicable_questions(sales_log).select { |q| q.enabled?(sales_log) } }.flatten
-      applicable_questions.filter { |q| q.unanswered?(sales_log) }.map(&:id)
+      applicable_questions.filter { |q| q.unanswered?(sales_log) }.map(&:id) - sales_log.optional_fields
     end
   end
 end