How To Fix PIC01123 - The MPN-MRP set for material & is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: PIC01 - Parts Interchangeability Message Class

• Message number: 123

• Message text: The MPN-MRP set for material & is not unique

What causes this issue?

In item &V4& of purchasing document &V3&, material &V1& should be
replaced by material &V2&. This is not possible, as no unique MPN
MRP-set has been determined for material &V1&.

System Response

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PIC01123 - The MPN-MRP set for material & is not unique ?

  The SAP error message PIC01123 indicates that the MPN (Manufacturer Part Number) and MRP (Material Requirements Planning) set for a specific material is not unique. This typically occurs when there are multiple entries for the same MPN in the system, which can lead to confusion in material planning and procurement processes.
  Cause:
  
  Duplicate MPN Entries: The most common cause of this error is that there are multiple records in the system for the same MPN associated with the material.
  Incorrect Configuration: The configuration settings for MPNs and MRP might not be set up correctly, leading to conflicts.
  Data Migration Issues: If data was migrated from another system, it’s possible that duplicates were introduced during the migration process.
  
  Solution:
  
  
  Check MPN Records: 
  
  Go to the relevant transaction (e.g., MM03 for material master) and check the MPN records for the material in question.
  Look for duplicate entries and determine which one should be retained.
  
  
  
  Delete or Merge Duplicates: 
  
  If duplicates are found, you can either delete the unnecessary entries or merge them if applicable.
  Ensure that the remaining MPN entry is correctly linked to the material.
  
  
  
  Review MRP Settings: 
  
  Check the MRP settings for the material to ensure that they are correctly configured and that there are no conflicting settings.
  
  
  
  Data Consistency Check: 
  
  Run a consistency check on the material master data to identify any other potential issues that might be causing the error.
  
  
  
  Consult Documentation: 
  
  Review SAP documentation or consult with your SAP support team for specific guidelines on handling MPN and MRP configurations.
  
  
  
  Testing: 
  
  After making changes, test the material planning process to ensure that the error does not reoccur.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  MM03 (Display Material), MM02 (Change Material), and MM01 (Create Material) are commonly used for managing material master data.
  
  
  
  MPN Configuration: 
  
  MPNs are often used in conjunction with vendor data, so ensure that vendor records are also checked for consistency.
  
  
  
  SAP Notes: 
  
  Check SAP Notes for any known issues or patches related to MPN and MRP settings that might address this error.
  
  
  
  User Roles and Authorizations: 
  
  Ensure that the user has the necessary authorizations to make changes to the material master data.
  
  
  
  By following these steps, you should be able to resolve the PIC01123 error and ensure that your MPN and MRP settings are unique and correctly configured.