How To Fix IO123 - Material number & is already contained in the object list

IO123 - Overview

• Message type: E = Error

• Message class: IO - Plant Maintenance: Object List

• Message number: 123

• Message text: Material number & is already contained in the object list

What causes this issue?

You have tried to enter a <DS:GLOS.material number>material number</>
in the <DS:GLOS.object list>object list</> which is already contained
in the object list.

System Response

INCLUDE KEINE-FUNKTION OBJECT DOKU ID TX LANGUAGE EN

How to fix this error?

Delete the entry.

Error message extract from SAP system. Copyright SAP SE.

IO123 - Details

• The SAP error message IO123, which states that "Material number & is already contained in the object list," typically occurs in the context of Inventory Management or Production Planning when you are trying to add a material to a list (such as a BOM, production order, or inventory list) that already contains that material.
  
  Cause:
  
  Duplicate Entry: The most common cause of this error is that the material you are trying to add is already present in the list you are working with.
  Incorrect Data Entry: There may be a mistake in the data entry process, such as trying to add the same material multiple times.
  System Configuration: In some cases, the system configuration or customizations may lead to this error if the logic for handling materials is not set up correctly.
  
  
  Solution:
  
  Check the Object List: Review the object list you are working with to confirm whether the material is already included. If it is,