You can only copy or replace object &1 in structure mode

What causes this issue?

You can only copy or replace the organizational object &V1& in
structure mode, because multiple object dependencies need to be
considered.

System Response

The action cannot be carried out in single mode.

How to fix this error?

Copy or replace the org. object in structure mode. Choose "Structure"
and select a suitable enterprise structure from "Templates" or enter
your own choice in "Navigation".

Error message extract from SAP system. Copyright SAP SE.