How To Fix K0151 - A sub-hierarchy already exists for the field &.

SAP Error Message - Details

• Message type: E = Error

• Message class: K0 - Error Messages for Central Controlling Routines

• Message number: 151

• Message text: A sub-hierarchy already exists for the field &.

What causes this issue?

You want to create a sub-group in a multi-field group for field &V1&.
However, a sub-group already exist for this field. Only one sub-group
may belong to each field in a multi-field group.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

You may not create a further sub-group for field &V1&, but you may
insert further nodes beneath the highest node of the sub-group.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message K0151 - A sub-hierarchy already exists for the field &. ?

  The SAP error message K0151 ("A sub-hierarchy already exists for the field &.") typically occurs in the context of SAP Controlling (CO) when you are trying to create or modify a hierarchy in a master data structure, such as cost centers, internal orders, or profit centers. This error indicates that the system has detected that a sub-hierarchy already exists for the specified field, which prevents the creation of a new hierarchy or modification of the existing one.
  
  Cause:
  
  Existing Hierarchy: The most common cause of this error is that there is already a defined sub-hierarchy for the specified field in the system. This means that the structure you are trying to create or modify conflicts with an existing structure.
  Data Integrity: The system enforces data integrity rules to ensure that hierarchies are not duplicated or incorrectly structured, which can lead to inconsistencies in reporting and analysis.
  
  
  Solution:
  
  Check Existing Hierarchies: Before attempting to create or