How can we do autoinvoice grouping based on inventory item and not inventory item.

Summary:

Hello We have existing grouping rule based on delivery number(LINE_INTERFACE_ATTRIBUTE7). Due to which, system is doing creating two seperate invoices for inventory item and non inventory item because on inventory item, delivery number is correctly populated, however , on non inventory item there is no delivery number which as expected as well .

Now we want to do grouping on inventory and non inventory items as well.

How can we achieve this?

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