How To Fix /SAPAPO/PDEM226 - Supersession chain contains an invalid cycle

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/PDEM -

• Message number: 226

• Message text: Supersession chain contains an invalid cycle

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/PDEM226 - Supersession chain contains an invalid cycle ?

  The SAP error message /SAPAPO/PDEM226 indicates that there is a problem with a supersession chain in the Advanced Planning and Optimization (APO) module of SAP. Specifically, it means that the supersession chain contains an invalid cycle, which can disrupt the planning process.
  Cause:
  
  Cyclic Supersession Relationships: The most common cause of this error is the presence of a cyclic relationship in the supersession chain. For example, if product A supersedes product B, and product B also supersedes product A, this creates a cycle that is not valid.
  Incorrect Data Entry: Manual errors during the creation or maintenance of product master data can lead to invalid relationships.
  Data Migration Issues: If data has been migrated from another system, it may not have been properly validated, leading to cycles in the supersession relationships.
  
  Solution:
  
  
  Check Supersession Relationships: Review the supersession relationships for the products involved. Ensure that there are no cycles. You can do this by:
  
  Navigating to the product master data in the SAP GUI.
  Checking the supersession details for each product.
  Ensuring that each product only supersedes another product in a linear fashion without returning to the original product.
  
  
  
  Correct Invalid Relationships: If you find any cyclic relationships, correct them by:
  
  Removing or modifying the supersession entries to eliminate the cycle.
  Ensuring that each product only has one direct supersession relationship leading to another product.
  
  
  
  Data Validation: Implement data validation checks to prevent the creation of cyclic relationships in the future. This can include:
  
  Setting up validation rules in the product master data maintenance process.
  Regularly auditing the supersession chains to catch any issues early.
  
  
  
  Consult Documentation: Refer to SAP documentation or help notes related to product master data and supersession management for additional guidance.
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like /SAPAPO/MAT1 (Product Master) or /SAPAPO/PDM (Product Data Management) to view and edit product master data.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide patches related to this error.
  Support: If the issue persists after checking and correcting the data, consider reaching out to SAP support for further assistance.
  
  By following these steps, you should be able to resolve the /SAPAPO/PDEM226 error and ensure that your supersession chains are valid and functioning correctly.