title: Need to import custom fields of product in magento
body: <p>I want to insert some custom fields of product into a table. But When I upload the CSV file then it shows me error as 
  "Column names: "_custom_option_tier_customer_group", "_custom_option_tier_price", "_custom_option_tier_price_qty" are invalid"</p>
  
  <p>And I have these custom fields </p>
  
  <p><img src="https://i.stack.imgur.com/NMFtA.png" alt="enter image description here"></p>
  
  <p>So can you please help me how I can import the fields and bypass the validation error.</p>