How To Fix E2401 - Definition of key components is deleted

E2401 - Overview

• Message type: E = Error

• Message class: E2 - DE Data Dictionary

• Message number: 401

• Message text: Definition of key components is deleted

What causes this issue?

You already decided on the alternative <LS>Key components</> as key
definition and defined the key components. You now selected a different
alternative.

System Response

The system gives a warning.

How to fix this error?

If you confirm the change in the key definition, the defined key
components are deleted. If you do not want to do so, you must set the
alternative <LS>Key components</> again.

Error message extract from SAP system. Copyright SAP SE.

E2401 - Details

• The SAP error message E2401, which states "Definition of key components is deleted," typically occurs in the context of SAP's Material Management (MM) or Production Planning (PP) modules. This error indicates that a key component, which is essential for a specific process (like a bill of materials or a production order), has been deleted or is no longer defined in the system.
  
  Cause:
  
  Deletion of Key Components: The most common cause is that a key component (like a material or part number) has been deleted from the system, but it is still referenced in other documents or processes.
  Data Inconsistency: There may be inconsistencies in the database where the component is referenced but not available.
  Transport Issues: If changes were transported from one system to another (e.g., from development to production), the transport might not have included all necessary components.
  
  
  Solution:
  
  
  Check Component Definition: Verify if the key component is still defined in the system. You