Hi Abhilash,
Follow this
1.go to se16 and get the deliveries for this year with line item 10 and load them to excel.
2. get the list of deliveries same as above for line item 20 and store them in other sheet.
3. Now remove the deliveries which are there in your 2nd sheet from 1st sheet.
Now you ll be left with deliveries which have only one line item.
PS: provided you do not have any missed line item numbers. In case if you do you might need to remove the deliveries which has line item 30.
As you need this for one time this is the best option.
Regards,
Venkateshwarlu