Cancellation of billing

Dear Expert

When going to cancel a Billing Document ,Log is appear as

1. Cancellation document is not the same as the original billing doc

2. Data inconsistency during the processing of document

Where in document overview

Inv is fall with Rs 253889.25

Cancel invoice is fall with Rs 253889.00

When Check the Split analysis , it is shown as

Filed                                              Inv Document No                        Cancellation  document number

Bill type                                                ZF2                                                  S1

Sd Document Category                            M                                                  N

ID :- Exchange Rate Setting                                                                            X

Please advice

Thanks in advance