The level of the node ID & does not suit the lev. of the higher lev. node

What causes this issue?

The hierarchy level of the parent node must be one larger than the
hierarchy level of the actual node. This is not the case for the node
with ID &V1& and its parent node with ID &V2&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Correct the hierarchy level of the node or of the parent node in your
source system.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.