Suggestion:
In the system, Lot no, For an auto- generated QC order, the lot number is set from the relevant transaction and is non-editable. For a manual QC order enter the lot number in which the material is available in the Inventory.
Lot sl, for an auto-generated QC order, it is set from the lot sl entered in the relevant transaction and is non-editable. If the lot sl is multiple, it will be set as Null. For a manual QC order enter the lot sl in which the material is available in the Inventory.
However, if there are multiple lot sl for the specified lot number, then leave this field blank.