SAP Message RTMATGPR_HIER004 - BW extraction: Incorrect update of node(s)

Diagnosis
An attempt to save several records from the material hierarchy failed.Update mode &V1& (I=Insert, U=Update) was used.

System Response
Within Customizing for the material hierarchy, it is possible to updatethe data using an array insert. This array insert failed in modeV1.

Procedure
Make sure the data has the correct syntax.