se319 - when deleting SES

[janusap]

Dear All,

Service PO created with one PO line item and 10 service line items (without service No.)

For Service line item 6 and 7 , Service entry sheet created and GRN also posted in the background.

In the SES display, it is showing all the 9 line items with zero quantity except 6 and 7.

After GR user has manually revoked the Acceptance indicator.

Now client want to delete the service entry sheet but it is showing error as"Please enter the quantity SE319".

If i enter quantity then following error displays "SE363 Quantity exceeds the quantity in purchase order"

Please suggest how to delete the service entry sheet.