Is there a field with the original PRIMARY_QUANTITY for the table INV_TXN_REQUEST_LINES

Summary:

I have a report with the INV_TXN_REQUEST_LINES table using PRIMARY_QUANTITY but this field changes value as pick slips are recorded and confirmed.

I need a field with the original value of PRIMARY_QUANTITY, or the relation between the quantity fields.

Content (please ensure you mask any confidential information):

I had record the value of the quantity fields in time to understand the PRIMARY_QUANTITY field behaviour

HEADER_ID REQUEST_NUMBER LINE_ID LINE_NUMBER LAST_UPDATE_DATE (HEADER) HEADER_STATUS LAST_UPDATE_DATE (LINE) LINE_STATUS LINE_STATUS_DATE QUANTITY QUANTITY_DELIVERED QUANTITY_DETAILED PRIMARY_QUANTITY