How To Fix USMD1409 - Data model &1: DDIC structure &2 cannot be automatically modified

USMD1409 - Overview

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 409

• Message text: Data model &1: DDIC structure &2 cannot be automatically modified

What causes this issue?

The data dictionary (DDIC) structure &V2& contains a complex APPEND
structure.

System Response

The DDIC structure &V2& has not been changed.

How to fix this error?

You need to use the ABAP Dictionary to make changes directly to DDIC
structure &V2& . Changes will be necessary if data model &V1& was
changed for the
respective entity type.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message USMD1409 - Data model &1: DDIC structure &2 cannot be automatically modified ?

  The SAP error message USMD1409 indicates that there is an issue with the Data Model in the context of SAP Master Data Governance (MDG). Specifically, it states that the Data Dictionary (DDIC) structure cannot be automatically modified. This error typically arises during the process of data model adjustments or when trying to implement changes to the data model that involve DDIC structures.
  
  Cause:
  
  
  Incompatible Changes: The changes you are trying to make to the data model may not be compatible with the existing DDIC structure. This can happen if the changes involve altering fields, data types, or other attributes that cannot be automatically adjusted by the system.
  
  
  Custom Fields: If you are trying to add or modify custom fields that are not properly defined or are conflicting with existing definitions, this can lead to this error.
  
  
  Transport Issues: If the changes are being transported from one system to another (e.g., from development to production),