diff --git a/db/migrate/20200115020230_add_choice_index_to_exercise_answers.rb b/db/migrate/20200115020230_add_choice_index_to_exercise_answers.rb
index cb518bb42..da68e6ac8 100644
--- a/db/migrate/20200115020230_add_choice_index_to_exercise_answers.rb
+++ b/db/migrate/20200115020230_add_choice_index_to_exercise_answers.rb
@@ -1,6 +1,6 @@
 class AddChoiceIndexToExerciseAnswers < ActiveRecord::Migration[5.2]
   def change
-    add_column :exercise_answers, :choice_index, :integer, default: 1
+    # add_column :exercise_answers, :choice_index, :integer, default: 1
 
     multi_questions = ExerciseQuestion.where(question_type: 1)
     multi_questions.includes(:exercise_choices, :exercise_answers).find_each do |question|