How To Fix S~021 - There is already a component &1 that refers on component &2

SAP Error Message - Details

• Message type: E = Error

• Message class: S~ - Repository API Business Navigator

• Message number: 021

• Message text: There is already a component &1 that refers on component &2

What causes this issue?

To insert a customer model you tried to insert a new component refering
to an SAP component. But the component is already refered by an
existing component.

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?

Use the existing component to add your model.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message S~021 - There is already a component &1 that refers on component &2 ?

  The SAP error message S~021, which states "There is already a component &1 that refers to component &2," typically occurs in the context of SAP's component management, particularly when dealing with the assignment of components in a structure or hierarchy. This error indicates that there is an attempt to create a reference or assignment that already exists, leading to a conflict.
  Cause:
  
  Duplicate Assignment: The error is often caused by trying to assign a component (e.g., a material, service, or other object) to another component when that assignment already exists in the system.
  Data Integrity Issues: There may be inconsistencies in the data, such as multiple entries for the same component or incorrect references.
  Configuration Errors: In some cases, the error may arise from incorrect configuration settings in the system that allow for duplicate entries.
  
  Solution:
  
  Check Existing Assignments: Review the existing components and their assignments to identify if the component you are trying to add already exists. You can do this by navigating to the relevant transaction or using reports that list component assignments.
  Remove Duplicate Entries: If you find that the component is already assigned, you may need to remove the duplicate entry or modify the existing assignment to accommodate the new requirement.
  Data Cleanup: If there are inconsistencies in the data, consider performing a data cleanup to ensure that there are no duplicate or conflicting entries in the system.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on managing components and resolving conflicts.
  Contact Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support or your internal IT team for further assistance.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may need to use specific transaction codes (e.g., SE11 for data dictionary, SE80 for object navigator) to investigate the components and their relationships.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  System Logs: Review system logs for any additional error messages or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.