Similar questions: How to create 2 devices
with same identifier number? What to do if 2 devices in different departments
have exactly the same tag number (identifier)?

Creating
multiple devices with same identifier is possible if they belong to different
organizational structure units and none of those units is a parent to another.
In the
window that opens, select an organizational unit that a new device belongs to
from the drop down list:
This unit has to be a
different one from units where device with such identifier number already exists,
and this unit is not supposed to be a child (sub-unit) of the one having a
device with the same number. It it not possible to create 2 devices with the
same identifier in case they exist within the same organizational unit.
In case a device with same
identifier exists within unit selected or within it’s parent unit – a notice will
be displayed not allowing to create the device with such number.
Within isolating devices list
it will be possible to differentiate these devices looking at their “Unit”
column even if they’re having the same Identifier.