The subtree root &1 does not exist in the target hierarchy

What causes this issue?

The root node with InfoObject &V2& and technical name &V1& for the
hierarchy that needs to be included as a subtree does not exist in the
target hierarchy as a node.

System Response

The hierarchy is not included as a subtree, and the process is
cancelled.

How to fix this error?

If the hierarchy needs to be included as a subtree by means of the
loading process, the hierarchy to be loaded or the target hierarchy
needs to be changes so that the root node to be included in the
hierarchy as a subtree occurs in the target hierarchy as a node.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.