Cumulative received quantity in Schedule agreement

Dear All,

We are facing an issue with schedule agreement. At the time inbound idoc (DELINS) is created system is giving error "Cumulative issued quantity is not equal cumulative received quantity".

Analysis done:

For a quantity of 1300 it is in transit and for this quantity delivery is completed and PGI is done. How to update cumulative quantity received field with delivered quantity. I am new to this process, in my analysis i came to know, if we update cumulative quantity received with same of issued quantity then issue might resolve but, there is an idoc involved in it. Can you please guide in helping me out solving the issue.

Thanks in advance!

Regards,

Vinod