How To Fix LOP020 - External reference &1 is not unique for the option list. Key &2

LOP020 - Overview

• Message type: E = Error

• Message class: LOP - Logistical contract options

• Message number: 020

• Message text: External reference &1 is not unique for the option list. Key &2

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message LOP020 - External reference &1 is not unique for the option list. Key &2 ?

  The SAP error message LOP020 indicates that there is a problem with the uniqueness of an external reference in the option list. This typically occurs in the context of configuration or master data management, where the system expects a unique identifier for a specific option but finds multiple entries that match the criteria.
  
  Cause:
  The error message "LOP020 External reference &1 is not unique for the option list. Key &2" usually arises due to one of the following reasons:
  
  
  Duplicate Entries: There are multiple entries in the option list that share the same external reference. This can happen if data was imported or created incorrectly, leading to duplicates.
  
  
  Incorrect Configuration: The configuration settings for the option list may not be set up correctly, leading to conflicts in how external references are defined.
  
  
  Data Integrity Issues: There may be issues with data integrity in the database, where the expected relationships between data elements are not maintained.
  
  
  
  Solution:
  To