How To Fix WPS01133 - Cycle in hierarchy found: key &1 / ext. ID &2 has itself as sub task list

WPS01133 - Overview

• Message type: E = Error

• Message class: WPS01 - Revision Planning - Task List Hierarchy

• Message number: 133

• Message text: Cycle in hierarchy found: key &1 / ext. ID &2 has itself as sub task list

Self-Explanatory Message

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• What is the cause and solution for SAP error message WPS01133 - Cycle in hierarchy found: key &1 / ext. ID &2 has itself as sub task list ?

  SAP Error Message:
  WPS01133
  Text: Cycle in hierarchy found: key &1 / ext. ID &2 has itself as sub task list
  
  Cause
  This error occurs when there is a circular reference (cycle) in the task list hierarchy. Specifically, a task list (identified by key &1 and external ID &2) is assigned as a sub-task list to itself, either directly or indirectly through a chain of sub-task lists. This creates an infinite loop or cycle in the hierarchy, which is not allowed in SAP.
  
  Explanation
  
  In SAP, task lists (e.g., maintenance task lists, production task lists) can have sub-task lists to represent hierarchical operations.
  The system expects a tree structure without cycles.
  If a task list is assigned as a sub-task list to itself, or if a chain of sub-task lists eventually references the original task list again, the system detects a cycle.
  This violates the hierarchical integrity and causes the error WPS01133.
  
  
  Solution
  
  
  Identify the cycle:
  
  Check the task list &1 with