Pay Item Extension SFXE field

  Hello,

When you enter a voucher or an invoice, on the pay item line you have this field : pay Item Extension Number SFXE field. The explanation for it is that represents a code to designate an adjusting entry to a pay item on a voucher or invoice. This field is required so that each record is unique. This explanation is not very clear for me. If someone used this field or know something more about it, please let me know.

Best Regards,
Paula