diff --git a/db/migrate/20190505093440_init_use_index.rb b/db/migrate/20190505093440_init_use_index.rb
index d885c3a9d..b7c3101dd 100644
--- a/db/migrate/20190505093440_init_use_index.rb
+++ b/db/migrate/20190505093440_init_use_index.rb
@@ -2,8 +2,8 @@ class InitUseIndex < ActiveRecord::Migration[5.2]
   def change
     remove_index :users, name: :index_users_on_login if index_exists?(:users, :login, name: :index_users_on_login)
     remove_index :users, name: :index_users_on_mail if index_exists?(:users, :mail, name: :index_users_on_mail)
-    add_index :users, :login, unique: true
-    add_index :users, :mail, unique: true
-    add_index :users, :phone, unique: true
+    # add_index :users, :login, unique: true
+    # add_index :users, :mail, unique: true
+    # add_index :users, :phone, unique: true
   end
 end
diff --git a/db/migrate/20190621010002_change_default_to_max_num.rb b/db/migrate/20190621010002_change_default_to_max_num.rb
new file mode 100644
index 000000000..435756cd8
--- /dev/null
+++ b/db/migrate/20190621010002_change_default_to_max_num.rb
@@ -0,0 +1,5 @@
+class ChangeDefaultToMaxNum < ActiveRecord::Migration[5.2]
+  def change
+    change_column :graduation_tasks, :max_num, :integer, default: 5
+  end
+end