SAP Message >0101 - You must specify a reconciliation key to be able to reverse document &1

Diagnosis You want to reverse document &V1&. This is not a statistical document,so you need to specify a reconciliation key. A reconciliation key hasnot been entered. System Response Online: Error message. Correction is required. In background: Error message. Processing is terminated. Procedure Online: If the appropriate input field is included on the screen, enter areconciliation key. If not, deal with the error as if it had occurredin the background. In background: INCLUDE NA_SYSADMIN1 OBJECT DOKU ID TX Procedure for System Administration INCLUDE FICA_NA_OSS OBJECT DOKU ID TX