Exclude or Include "Auto-enter Calculation replaces existing value" fields when syncing?

Hi,

I have a syncing solution where the spoke is a Copy of the Hub.

One of the fields in the solution is UPC (barcode). When the Spoke user enters a barcode into UPC lookups are performed on three additional fields, Product, Size and SKU.

The settings on these three fields are 'Indexed, Auto-enter Calculation replaces existing value'.

All four fields (UPC, Product, Size and SKU) need to be displayed on Hub after Spoke syncs.

Should Product, Size and SKU be excluded from Sync since they are contain looked up values? Or should UPC be the only field included in the sync?

Thanks,

ft.