FIX sorting to projectcategory

db/migrate/20191218022602_sort_to_project_categories_with_position.rb

@@ -0,0 +1,7 @@
+class SortToProjectCategoriesWithPosition < ActiveRecord::Migration[5.2]
+  def change
+    ProjectCategory.order(:updated_at).each.with_index(1) do |pc, index|
+      pc.update_column :position, index
+    end
+  end
+end