Post Author not update

Hello! I have a csv file consisting of page detail with Post Author name.
example my detail in csv file:
tp_name: ABC

In Other Page options under Post Author box I put: {tp_name[1]}

once upload file complete, I checked the Authors detail shows my name (which is the user that have upload/import the detail)

I want the Authors name : ABC

Can you please tell me how to load the author name based on selected field?