In case after processing some documents had created related documents, all these documents should be linked to the processed (root) document
According to this requirement should be linked to each other the following documents:
Shipping Schedule for e-Commerce -> Pick&Generate Label button -> Generate Label. Amount from generated Label should be linked to current SO and vise versa)
Create PO -> mark as Consignment -> Receive PO -> Create SO with Item from PO -> use from Item Receipt -> ship SO -> create Invoice -> approve Invoice. Created from Consignment Bill should be linked to SO