Credit memo and cancel invoice in SAP FI

[Tuanh023]

Hi everyone,

Could you please explain the difference between Cancel invoice by MR8M and Create credit memo by MIRO?

I have a Purchase order with fully GR and IR.

GR entry with quantity 5174KG

DR stock: 743,498 

CR freight ( freight as condition price in PO): 743,498

But when we posted the invoice, we entered the quantity IR as 13930 KG.

IR entry: 

Dr stock: 241,570

DR Freight: 2,410,536

CR payable: 2,652,106

Therefore, we cannot clear the Freight account.

Which transaction we can use in this case to decrease the amount in Freight of IR entry?

Thank you.