Where does 'CONTEXT' field get defaulted from on Sales Orders

Hi,

Issue: Sales orders are stuck in AR Interface with following error -' Invoice lines with the same invoice number have been separated by the grouping process, causing duplicate invoice numbers'.

When we analysed, we found that 'HEADER_ATTRIBUTE_CATEGORY' field is null for one of the SO in AR Interface; this field is same as 'CONTEXT' field on Sales Order Header.

Now, We want to know 'Where does 'CONTEXT' field get defaulted from on Sales Orders?'

(Please find attachement for more info)

Thanks

Keshav Ingale