Once you create a work item, you can reuse the data to create a new work item. For example, you may want to use the data to create a document from a different template with shared fields. This avoids entering the data again.
Copying a work item creates a new work item. If you want to maintain the work item and use its data in other templates, consider using the answer overlay feature.
If a new template is selected, ensure that the template uses the same field names. If there are no shared field names, HotDocs Advance is unable to populate the answer data.