How to handle IB asset with Un-referenced RMA Orders for Non serial Items

Summary:

I can create IB record for Non serialized items upon order shipment and I can return it with Referenced RMA orders.which will then update the IB with Customer information.

when it comes to No reference Return orders I am unable to update the IB because it is non serial item and there is no Order reference. Is there a way I can connect existing IB with no referenced RMA order ? I can only see manual process for this.

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