How To Fix PPEENG143 - &1 between &2 and &3 cannot be deleted because of cardinality

SAP Error Message - Details

• Message type: E = Error

• Message class: PPEENG - iPPE Engine Messages

• Message number: 143

• Message text: &1 between &2 and &3 cannot be deleted because of cardinality

What causes this issue?

You have tried to delete a relationship of type &v1& between the
objects &v2& and &v3&. The Customizing for relationship type &v1&
prescribes a minimum number of relationships of type &v1& between
object &v2& and &v3&. If you delete the relationship, the minimum
requirement would not be met.

System Response

The system does not allow you to delete the relationship of type &v1&
between &v2& and &v3&.

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.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PPEENG143 - &1 between &2 and &3 cannot be deleted because of cardinality ?

  The SAP error message PPEENG143 indicates that there is a cardinality issue when trying to delete a relationship or assignment between two objects in the system. This typically occurs in the context of SAP's Project System (PS) or Production Planning (PP) modules, where relationships between objects (like tasks, activities, or components) are defined.
  Cause:
  The error message "PPEENG143 &1 between &2 and &3 cannot be deleted because of cardinality" suggests that the system is enforcing a rule regarding the relationships between the specified objects. Cardinality refers to the rules that define how many instances of one entity can or must be associated with instances of another entity. 
  For example, if you are trying to delete a relationship between two objects (like a task and a project), the system may prevent this action if:
  
  The relationship is required for the integrity of the data model.
  There are other dependent objects that rely on this relationship.
  The relationship is part of a defined structure that cannot be altered without violating business rules.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Dependencies: Investigate if there are other objects or relationships that depend on the one you are trying to delete. You may need to delete or modify those dependencies first.
  
  
  Review Cardinality Rules: Understand the cardinality rules defined for the objects involved. This may require consulting the data model or documentation for the specific module you are working with.
  
  
  Use Transaction Codes: Utilize relevant transaction codes (like CJ20N for Project Management or C223 for Change Master) to analyze the relationships and dependencies.
  
  
  Consult Documentation: Look into SAP documentation or help resources for specific guidance on the objects you are working with. This can provide insights into why the deletion is restricted.
  
  
  Seek Help from SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support or your internal SAP team for assistance. They may have additional tools or insights to help you troubleshoot the problem.
  
  
  Related Information:
  
  Cardinality Types: Familiarize yourself with the types of cardinality (one-to-one, one-to-many, many-to-many) as they apply to your specific scenario.
  Data Integrity: Understand the importance of maintaining data integrity within SAP systems, as this is often the reason for such restrictions.
  Change Management: If you are working in a project environment, ensure that any changes you make are documented and communicated to relevant stakeholders to avoid confusion.
  
  By following these steps, you should be able to identify the root cause of the error and take appropriate action to resolve it.