import headers push exist_header & header

lib/tallty_import_export/import.rb

@@ -119,9 +119,9 @@ module TalltyImportExport
       result = []
       val.map do |header|
         if (exist_header = import_headers_result.find { |model_header| model_header[:key] === header[:key] })
-          result.push(exist_header.merge(name: header[:name], json: header[:json]))
+          result.push(exist_header.merge(header.compact))
         else
-          result.push({ key: header[:key], name: header[:name], json: header[:json]})
+          result.push(header)
         end
       end