How To Fix M8_2111 - Unique assignment of the item using &1 &2 is not possible

M8_2111 - Overview

• Message type: E = Error

• Message class: M8_2 - Logistics Invoice Verification

• Message number: 111

• Message text: Unique assignment of the item using &1 &2 is not possible

What causes this issue?

The IDoc contains an item with reference to <(>&<)>1 <(>&<)>2 from a
transportation management system.
For <(>&<)>1 <(>&<)>2, a number of freight settlement documents were
transferred. A unique assignment of the EDI invoice item to a freight
settlement document is therefore not possible.

System Response

The invoice cannot be posted.

How to fix this error?

For technical reasons, one purchase order is created per freight
settlement document, which the system requires for invoice creation.
In the IDoc, include the number of the purchase order that was created
with reference to this freight settlement document as a selection
criterion in addition to <(>&<)>1 <(>&<)>2.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

M8_2111 - Details

• The SAP error message M8_2111, which states "Unique assignment of the item using &1 &2 is not possible," typically occurs in the context of inventory management or material management when there is an attempt to assign a unique identifier to an item that is already associated with another identifier or when the system cannot uniquely identify the item based on the provided parameters.
  Causes:
  
  Duplicate Entries: The item you are trying to assign may already have an existing assignment with the same unique identifier.
  Incorrect Configuration: The configuration settings for the material or item may not allow for unique assignments based on the specified fields.
  Data Integrity Issues: There may be inconsistencies or errors in the master data that prevent the system from recognizing the item as unique.
  Missing or Incorrect Parameters: The parameters (&1 and &2) used for the assignment may not be correctly defined or may not correspond to the expected fields.
  
  Solutions:
  
  Check Existing