How To Fix STGR123 - Plant &1 is already a purchasing reference plant

STGR123 - Overview

• Message type: E = Error

• Message class: STGR - Hold store grouping messages

• Message number: 123

• Message text: Plant &1 is already a purchasing reference plant

What causes this issue?

The plant that you want to assign to a reference plant is already a
reference plant itself with its own assigned plants.
A reference plant cannot be an assigned plant.

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?

Select another plant using help list.
If you really want to assign an existing reference plant to another
reference plant, you have first to unassign all its assigned plants.
The reference plant will automatically become a normal plant and then
you will be able to assign it to another reference plant.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message STGR123 - Plant &1 is already a purchasing reference plant ?

  The SAP error message STGR123 indicates that the specified plant (denoted as &1) is already set up as a purchasing reference plant in the system. This typically occurs when you are trying to assign a plant to a purchasing organization or when you are attempting to create or modify a purchasing info record, and the plant is already associated with another purchasing organization.
  
  Cause:
  
  Existing Assignment: The plant is already assigned as a purchasing reference plant to another purchasing organization.
  Data Entry Error: There may be an attempt to assign the same plant to multiple purchasing organizations incorrectly.
  
  Configuration Issues: The configuration settings in the purchasing module may not be set up correctly.
  
  
  Solution:
  
  
  Check Existing Assignments:
  
  Go to the transaction code ME01 (Create Info Record) or ME03 (Display Info Record) to check if the plant is already assigned to a purchasing organization.
  Use transaction SPRO to navigate to the configuration settings for purchasing and check the assignments.
  
  
  
  Modify