Diagnosis
You tried to create a text item manually in the HU proposal. However,text items, as additional notes for packing personnel, can only becreated and edited in the packing instruction.
Text items are copied from packing instruction to HU proposal, but aredeleted when you save the HU proposal to create a handling unit.Therefore, it makes no sense to enter a text item in HU proposal, sinceit would be deleted when you save.

Procedure
Delete the manually entered text item.