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

PPEENG143 - Overview

• 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