How To Fix WXP260 - Plan version &1 is already assigned to planning scenario/step &2/&3

WXP260 - Overview

• Message type: E = Error

• Message class: WXP - Retail Planning

• Message number: 260

• Message text: Plan version &1 is already assigned to planning scenario/step &2/&3

What causes this issue?

You want to copy data from <DS:DE.WISP_VRSIO>plan version</> &V1& of
source planning step &V4&. Plan version &V1& has, however, already been
assigned to <DS:DE.WISP_PLSCH>planning step</> &V3& in
<DS:DE.WISP_PLSZN>planning scenario</> &V2&.

System Response

The link cannot be executed.

How to fix this error?

Enter another source plan version. You can view possible entries using
input help (F4).

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.

WXP260 - Details

• Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WXP260 Plan version &1 is already assigned to planning scenario/step &2/&3
  
  Meaning / 
  Cause:
  This warning message indicates that the plan version you are trying to assign to a particular planning scenario and planning step is already assigned to that same scenario and step. In other words, the system is preventing duplicate assignment of the same plan version to the same planning scenario and step.
  
  Plan version (&1): The version of the plan you are working with.
  Planning scenario (&2): The scenario in which planning is being done.
  Planning step (&3): The specific step within the planning scenario.
  
  This message typically occurs during the configuration or maintenance of planning versions in SAP Integrated Business Planning (IBP) or SAP Supply Chain Planning (SCP) when you try to assign a plan version to a scenario/step where it already exists.
  
  
  Cause:
  
  The plan version has already been assigned to the