How do I copy a people picker column from one list to another?
Can you expand on what you are attempting to do?
To copy data from one field to another field via a workflow you can use the update list item and ensure that your data types for both fields are the same.
If you are wanting to copy a field from one list to another list so that the fields match and are the same, you can create a site column at the site collection level and add that "one" column to both list.
Hope that helps.
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