Packages with external documents that have already been filed with one record can be copied in their entirety into other records, provided that more than one document package is allowed in these contexts (e.g. for accounts, items, events).
Open the existing Document package. All further steps refer to this open input window.
Click on > Save and copy in the original document package (account, event etc.). Note: Unless you copy the document package before changing the link, the package will disappear from the original record.
Click on the dropdown triangle next to the linked record to select another record of the same type (account, event etc.) and Select.
Link the package to a record in another table by first selecting Delete assignment, then clicking on Link to other record.
Select the table and record you want and Save your input.