error while reversing document through mr8m

Dear Gurus,

When i went to reverse the document through mr8m , the error is coming "balance not zero; 8706.94-, debit 18256.68 credit 9549.74. Since the document is already posted through miro, how to reverse the document .

I try to reverse the document through miro with referece "credit memo", but the balance is not getting zero.

Please advice