MR8M posted to GR/IR instead of the Invoice expense Account

Dear Experts,

MIRO created FI document as follows-

DEBIT- Expense account

  CREDIT- Vendor

MR8M (Cancelation of the invoice) created FI -

DEBIT - Vendor

   CREDIT- GR/IR Account

Could anyone has any idea why the cancelation of the invoice posted against GR IR and not against the original expense account,

as in the invoice?

Thank you and Regards

Orly