How To Fix WXP234 - Target planning step &1 is not defined in planning scenario &2

WXP234 - Overview

• Message type: E = Error

• Message class: WXP - Retail Planning

• Message number: 234

• Message text: Target planning step &1 is not defined in planning scenario &2

What causes this issue?

You want to defined planning step &V1& as the target for a link.
However, this planning step has not been entered yet in planning
scenario &V2&.

System Response

Your entry cannot be copied.

How to fix this error?

Enter planning step &V1& in the maintenance for planning step &V2&.
This planning step can then be used as a target planning step in a
link.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

WXP234 - Details

• Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WXP234 Target planning step &1 is not defined in planning scenario &2
  
  
  Cause:
  This warning message occurs in SAP Integrated Business Planning (IBP) or SAP APO when you try to execute a planning run or a planning sequence that references a target planning step which has not been defined or included in the specified planning scenario.
  
  Planning Step: A planning step is a defined stage or phase in a planning sequence, such as demand planning, supply planning, or deployment.
  Planning Scenario: A planning scenario is a collection of planning steps and related settings that define the overall planning process.
  
  The system expects that the target planning step you want to use is part of the planning scenario you are working with. If it is missing, the system cannot proceed and raises this warning.
  
  When does it occur?
  
  When running a planning sequence or job that references