How To Fix CNV_PE400 - Object &1 (&2) must not be transported due to different system namespace

CNV_PE400 - Overview

• Message type: E = Error

• Message class: CNV_PE - General messages for posting engine

• Message number: 400

• Message text: Object &1 (&2) must not be transported due to different system namespace

What causes this issue?

Object <ZH>&V1&</> of type <ZH>&V2&</> has namespace <ZH>&V3&</> whereas
the current client has namespace <ZH>&V4&</>. This indicates that the
object was not originally created in the current client.
A transport of a posting engine object is only allowed from a system
with at least the same namespace.

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?

No further action possible.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CNV_PE400 - Details

• The SAP error message CNV_PE400 indicates that an object (identified by &1 and &2) cannot be transported due to a mismatch in the system namespace. This typically occurs during the transport of objects between different SAP systems, especially when the source and target systems have different configurations or namespaces.
  
  Cause:
  
  Namespace Mismatch: The object you are trying to transport belongs to a different namespace than what is allowed in the target system. SAP uses namespaces to differentiate between standard SAP objects and custom objects. For example, standard SAP objects usually reside in the SAP namespace, while custom objects might be in a namespace like Z* or Y*.
  Transport Layer Configuration: The transport layer settings in the source and target systems may not be aligned, leading to restrictions on what can be transported.
  Development Class Issues: The object may belong to a development class that is not allowed to be transported to the target system.
  
  
  Solution:
  
  Check