How To Fix MPE_OAN107 - External element number &1 already used in OAN &2, version &3

MPE_OAN107 - Overview

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 107

• Message text: External element number &1 already used in OAN &2, version &3

Self-Explanatory Message

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MPE_OAN107 - Details

• The SAP error message MPE_OAN107 indicates that there is a conflict with an external element number that has already been used in a specific Object Assignment Number (OAN) and version. This typically occurs in the context of managing object assignments in SAP, particularly in modules related to asset management or project systems.
  
  Cause:
  The error is triggered when you attempt to assign an external element number that is already associated with another OAN in the system. This can happen due to:
  
  Duplicate entries being created inadvertently.
  Incorrect data migration or import processes that lead to conflicts.
  Manual entry errors where the same external element number is reused.
  
  
  Solution:
  To resolve the MPE_OAN107 error, you can take the following steps:
  
  
  Check Existing Assignments:
  
  Use transaction codes like OAN1 or OAN2 to review existing object assignments and their associated external element numbers.
  Identify the OAN and version that is currently using the external element number in question.
  
  
  
  Modify or Delete Conflicting Entries:
  
  If the