Creating forms for publishing
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In the Unique Index column, change the Unique Index value to Yes.
You must define an index for the PO ID field because the PO ID is the primary key in this scenario. Usually, however, Request ID is the primary key. An index is predefined for the Request ID field, by default.

Save the Line Items form.
The following steps are optional. They enable you to view the line items of the corresponding purchase order in the same form.
In the Qualification field, enter this qualification to make sure that the PO ID from the parent form (Purchase Order) matches Line Item PO ID from the Line Items form:
$PO ID$ = 'Line Item PO ID'
If Request ID is your primary key, enter this qualification instead: $Request ID$ = 'Line Item PO ID'

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