You can add an existing product to a package by creating a link to the existing product. See Cut, Copy and Paste Commands for more information.
Notes:
If you attempt to copy a package into another package that has been assigned more than once, the following error message is displayed.
You also receive this message if you try to copy or add items that are displayed underneath a package that exists more than once in the Product Catalog. To determine where and how many times a catalog item has been assigned, enter the SKU in the Search Criteria window and click Search.
