Multiple Credit Memos generated for Return Sales Order

Summary:

We have return orders created for Credit Only (Return for Credit) where out of few lines in the order only some are reference to a source order and other are created without source reference. In this case two separate Credit Memos are generated for the order.
What we noticed is the order number in the AR line is populated as original order number where source reference is provided and RMA number for lines where reference number is not mentioned.

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