How To Fix LOP155 - Master data: Option list number &1 is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: LOP - Logistical contract options

• Message number: 155

• Message text: Master data: Option list number &1 is not unique

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LOP155 - Master data: Option list number &1 is not unique ?

  The SAP error message LOP155, which states "Master data: Option list number &1 is not unique," typically occurs in the context of SAP's Logistics Execution (LE) or Advanced Planning and Optimization (APO) modules. This error indicates that there is a problem with the uniqueness of an option list number in the master data.
  Cause:
  The error is caused by the presence of duplicate entries for the specified option list number in the master data. This can happen due to:
  
  Data Entry Errors: Duplicate entries may have been created inadvertently during data entry or data migration processes.
  Configuration Issues: Incorrect configuration settings in the system may lead to the generation of non-unique option list numbers.
  Master Data Inconsistencies: Inconsistencies in the master data can arise from improper data maintenance or updates.
  
  Solution:
  To resolve the LOP155 error, you can follow these steps:
  
  
  Identify Duplicates:
  
  Use transaction codes like SE16 or SE11 to access the relevant database tables (e.g., MARA, MARC, etc.) and check for duplicate entries for the option list number in question.
  You can also use transaction codes like LOP1 or LOP2 to view and manage option lists.
  
  
  
  Correct Duplicates:
  
  Once you identify the duplicates, you can either delete or merge the duplicate entries, ensuring that only unique entries remain in the system.
  If the duplicates are due to incorrect data entry, correct the entries to ensure they are unique.
  
  
  
  Check Configuration:
  
  Review the configuration settings related to option lists in the system. Ensure that the settings are correctly defined to prevent the creation of duplicate option list numbers in the future.
  
  
  
  Data Maintenance:
  
  Regularly maintain and audit your master data to prevent inconsistencies and duplicates from occurring.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on managing option lists and master data in your version of SAP.
  
  
  
  Contact SAP Support:
  
  If the issue persists or if you are unsure about making changes, consider reaching out to SAP support for assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LOP1 (Maintain Option List) and LOP2 (Display Option List) for managing option lists.
  Master Data Management: Understanding the principles of master data management in SAP can help prevent similar issues in the future.
  SAP Notes: Check for any SAP Notes related to LOP155 for additional insights or patches that may address the issue.
  
  By following these steps, you should be able to resolve the LOP155 error and ensure the integrity of your master data in SAP.