Once a customer’s field mapping is confirmed, upload their real booking file from their order page to bring the rows in as orders.
What happens on import
Every row is mapped through that customer’s confirmed field mapping into your schema’s fields, then saved as an order.
Re-importing (upsert by reference)
If a row’s reference value matches an order you already have for that
customer, importing it again updates that existing order instead of
creating a duplicate — so re-uploading a corrected or updated file is
always safe. A row with no reference (blank, or not mapped for that
customer) always inserts as a new order.
After import
New and updated orders both show up immediately in that customer’s order list and the property-wide Orders table.