How To Fix C5456 - Relationships already exist between the phases you have selected

SAP Error Message - Details

• Message type: E = Error

• Message class: C5 - Master Recipe

• Message number: 456

• Message text: Relationships already exist between the phases you have selected

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message C5456 - Relationships already exist between the phases you have selected ?

  The SAP error message C5456, which states "Relationships already exist between the phases you have selected," typically occurs in the context of project management or process management within SAP, particularly when dealing with the Project System (PS) module or similar functionalities.
  Cause:
  This error arises when you attempt to create a relationship (dependency) between two phases (or activities) in a project that already have an existing relationship. The system prevents the creation of duplicate relationships to maintain data integrity and avoid confusion in project scheduling.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Relationships:
  
  Navigate to the project or activity in question and review the existing relationships. You can do this by using transaction codes like CJ20N (Project Builder) or CJ02 (Change Project).
  Look for the phases you are trying to link and see if there is already a relationship defined.
  
  
  
  Modify Existing Relationships:
  
  If you find that a relationship already exists, you may need to modify it instead of creating a new one. You can change the type of relationship or adjust the dates as necessary.
  
  
  
  Delete Unnecessary Relationships:
  
  If there are redundant relationships that are not needed, you can delete them. Be cautious when doing this, as it may affect the project schedule.
  
  
  
  Use Different Phases:
  
  If your intention was to create a new relationship, consider whether you can use different phases or activities that do not already have an existing relationship.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for more detailed guidance on managing relationships in your specific version of SAP.
  
  
  
  Seek Help from SAP Support:
  
  If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting SAP Notes for any known issues or patches related to this error.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N, CJ02, and CJ03 (Display Project) for managing project structures and relationships.
  Project Management Best Practices: Understanding best practices in project management can help you avoid creating unnecessary relationships and maintain a clear project structure.
  SAP Community: Engaging with the SAP Community can provide insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to address the C5456 error and manage your project relationships effectively.