[{"_id":"6245131fdbcda3639d75c951","username":"joy","description":"description english","product_code_origin":"aaaa-a","product_code_filter":"aaaaa"},{"_id":"6245131fdbcda3639d75c952","username":"joy2","description":"description 222","product_code_origin":"bbbb-b","product_code_filter":"bbbbb"}]

db.collection.update({},[{$set:{description:{description_en:"$description",description_ko:""},product_code:[{product_code_origin:"$product_code_origin",product_code_filter:"$product_code_filter"}]}},{$unset:["product_code_origin","product_code_filter"]}],{multi:true})