Copy Sales Orders

Summary:

There is an sales order SO1 for customer X and there is an requirement to create sales order for same SKU for customer Y. So we are copying the sales order SO1. Once the sales order is copied we are changing the customer details at the top header.

We saved it and submitted for approval. Now when we are checking the lines it shows ship to details as old one (SO1) ideally as we have copied the sales order and updated the customer details at the header and upon save same should reflect at line level.

Just wanted to check are we copying the sales order in the right fashion?