SAP Message UCM0089 - Document &1 was used to reverse the inversion document &2 from &3/&4

Diagnosis
Document &V1& has been already inverted by document &V2& in period &V3&/ fiscal year &V4&. Further processing of these two documents willcommence only in pairs. Document &V2& is not being displayed because itdoes not lie within the timeframe you selected.

System Response
The reversal of document &V1& also reversed the associated inverteddocument &V2&.