Node [&1]: Overlapping invervals under parent node &2

What causes this issue?

The node NODEID = &V1& is an interval node. The value ranges [LEAFFROM -
LEAFTO] = &V3& and &V4& of the two interval nodes overlap. This is not
allowed because both nodes are child nodes of the same parent node
NODEID = &V2&.
Note that a maximum of 50 characters is available for message variables.
For this reason, the value ranges [LEAFFROM - LEAFTO] = &V3& and &V4&
might not be displayed correctly.

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?

Try to localize the problem. If the hierarchy is loaded from an SAP
source system, you can check whether the extracted data is correct by
executing transaction RSA3 in the source system. If necessary, check if
the data is modified with a user exit. If the hierarchy is loaded from a
file, check the contents of this file. The problem might also be due to
an error in the transfer rules or in the transformation.
You can identify the two duplicate nodes from the values for the node ID
NODEID = &V1&.
The problem can be caused by identical nodes delivered more than once
from the source. It is also possible that incorrect values for
parameters such as the node name NODENAME or validity period [DATEFROM,
DATETO] are the cause of the problem.
First check if the boundaries of the interval for the value ranges of
the two nodes [LEAFFROM - LEAFTO] = &V3& and &V4& are correct. The
boundaries of the interval consist of the characteristic value for the
hierarchy basic characteristic and the characteristic values of all the
characteristics compounded to this characteristic. Errors creating the
interval boundaries often result in duplicate nodes.
If the structure of the hierarchy is defined as time-dependent, the time
validity of a node can be restricted with the fields DATEFROM and
DATETO. Duplicate nodes generally do not occur if the validity intervals
of two nodes do not overlap in time. In this case, check if the fields
DATEFROM and DATETO are correctly filled.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.