I have a problem in using the function 'WS_DELIVERY_UPDATE'

I want to update the delivery document at the batch field (CHARG = '0000000605') by using the function 'WS_DELIVERY_UPDATE'.

Before update, this batch field is initial.

After having completely updated this delivery, I try to update this batch field again. However, I found the error message showing that 'Confirmed batch 0000000621 is different from batch 0000000605 for main item'.

How can I solve this problem to update this batch again? This error occurs when I use function

'WS_DELIVERY_UPDATE', 'BAPI_OUTB_DELIVERY_CONFIRM_DEC', and 'BAPI_OUTB_DELIVERY_CHANGE'.