SAP Message VI500 - Document &: error in determination of shipping due date index

Diagnosis
The delivery due index in the data base (table VEPVG) deviates from theindex just determined.

System Response
The incorrect document was entered in table TVIER.

Procedure
Check if a colleague used transactions VL04 and VL01 for the samedocument at the same time as you.
If this is not the case:
Start report RVV05IVC, if there are only a few entries in table TVIER.This report returns the data base to its correct state.
Otherwise, you must re-create the entire index in batch using reportRVV05IVB (parameter: ALL = X, not parallel to VAxx, VLxx und VFxx).
Inform the RV telephone service.