Caution! You are exporting standard hierarchy &

What causes this issue?

You want to export a standard hierarchy or import a generated
sequential data set that can consist of a standard hierarchy. Standard
hierarchies can be defined for cost centers, profit centers, and
business processes. Please note the following:
When you export a standard hierarchy, the SAP System breaks it down and
creates a sequential dataset. The single values from the end nodes of
the hierarchy are exported, but the master records for these single
values are not.
When you import a sequential dataset to another client or another
system, any existing data with the same name is overwritten.
To guarantee the standard hierarchy and master data are always
consistent, you should transport them together. To transport the master
data you must use a different function (client copy, transport).
RESET N1

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?

If the exported standard hierarchy does not exist in the target system,
you only need to transport the corresponding master data. If it does
exist, proceed as follows:
Check whether the master data should also be transported or already
exists in the target system for the relevant controlling area.
Generate a sequential dataset for the standard hierarchy (backup copy)
in the system using the export function.
Export the standard hierarchy in the source system
Import this standard hierarchy in the target system
Check whether the standard hierarchy in the target system is complete.
Use the following functions to do so:
Test standard hierarchy master data
Ambiguity check
Completeness check
If the standard hierarchy contains errors, you must either reimport the
backup copy or use <ZH>Modify standard hierarchy master data</>
functionto change or correct the master data. If you decide to do the
latter, first read the documentation for the modification program
(transaction SE38, program name RKCORRH1, Display Documentation).

Error message extract from SAP system. Copyright SAP SE.