How To Fix M2126 - Planning data exists - this data will be deleted

M2126 - Overview

• Message type: E = Error

• Message class: M2 - LIS: Generating and updating info structures

• Message number: 126

• Message text: Planning data exists - this data will be deleted

What causes this issue?

Planning data exists in one or more clients.

System Response

This data will be lost when you delete or change the information
structure.

How to fix this error?

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.

M2126 - Details

• The SAP error message M2126 ("Planning data exists - this data will be deleted") typically occurs in the context of material planning and inventory management. This message indicates that there is existing planning data for a material that is about to be deleted or modified, and SAP is warning the user that this data will be lost.
  
  Cause:
  
  Existing Planning Data: The error arises when you attempt to delete or change a material or planning object that has associated planning data (e.g., forecasts, planned orders, etc.).
  Data Integrity: SAP is designed to maintain data integrity, and this message serves as a warning to prevent unintentional loss of important planning information.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Planning Data: Before proceeding with the deletion or modification, check the existing planning data for the material. You can do this by navigating to the relevant planning transaction (e.g., MD04 for stock/requirements list) to