Direct Delivery Workbench confirming PO's

Hi,

When I try to confirm a PO and generate a full product receipt in the Direct delivery workbench, it generates or ties past POs to the DD PO you are trying to confirm and errors out.

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And when i delete the LD and LF PO’s and try to generate the full product receipt again, it just finds more PO’s to tie up and generates a different error.

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Any idea why this might be happening? Thanks