How To Fix VHU01090 - Missing external ID; internal ID already available as external ID

VHU01090 - Overview

• Message type: E = Error

• Message class: VHU01 - Message ID for Master Data Maintenance Packing Objects

• Message number: 090

• Message text: Missing external ID; internal ID already available as external ID

Self-Explanatory Message

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VHU01090 - Details

• The SAP error message:
  VHU01090: Missing external ID; internal ID already available as external ID
  
  
  Cause:
  This error typically occurs in SAP Vehicle Management (VHU) or related modules when there is an inconsistency or conflict in the identification numbers (IDs) used for vehicle or object master data.
  
  The system expects an external ID (usually a vehicle identification number or a customer-specific identifier) to be present.
  However, the external ID is missing in the data being processed.
  At the same time, the internal ID (SAP-generated unique identifier) that should be linked to the external ID is already assigned or exists as an external ID elsewhere.
  This situation causes a conflict because the system cannot reconcile the missing external ID with an internal ID that is already used as an external ID.
  
  In other words, the system finds an internal ID that is already registered as an external ID, but the current record lacks the required external ID, leading to