[{"_id":{"$oid":"62a8ad644035e93c7ff24607"},"user_name":"demo2@devia.com","password":"1234","college_id":{"$oid":"628dfd41ef796e8f757a5c13"},"basic_details":{"first_name":"ghgh","middle_name":"","last_name":"gh","email":"demo2@devia.com","mobile_number":1234567890},"address_details":{"country":{"country_id":{"$oid":"623012f9683f8fb7bd213c36"},"country_code":"IN"},"state":{"state_id":{"$oid":"623013d9683f8fb7bd2381c4"},"state_code":"MP"},"city":{"city_id":{"$oid":"6230139f683f8fb7bd21f1a9"},"city_name":"Akodia"},"address_line1":"","address_line2":"","pincode":""},"is_verify":false,"last_accessed":{"$date":{"$numberLong":"1655221604144"}},"created_at":{"$date":{"$numberLong":"1655221604144"}},"course_details":{}}]

db.collection.update({"address_details.communication_address":{"$exists":false}},[{$set:{"address_detailsB":{communication_address:"$address_details"}}},{$set:{"address_details":"$address_detailsB","address_detailsB":"$$REMOVE"}}])