GR/Ir account clearance . MR11

Hi Friends,

Need you help to clarifiy the following

1. I made a PO & Goods receipt is done .

2. I have done Invoice for this PO and also reversed the invoice i.e. Credit Memo done

3. Since I have done the invoice reversal now the GR/IR balance will exit . Now I want to clear the GR/IR account by cancelling the GR. i.e I want to do Movt type 102

4. While doing cancellation i.e. movt type 102 , system gives warning message as "Follow-up invoice(s) exist for Purchase Order 4500009019 00010 "

5. But it is getting posted and the GR/IR balance is getting nullified. Is this process is OK . Will it have any other financial posting impact?

Thx

deva