Message type: E = Error
Message class:  WRF_FOLUPART - Follow-Up/Replacement Material 
Message number: 069
Message text: &: Original material & in import file is a reference material
Original materials in an import file <ZH>cannot</> belong to the
following material categories:
Generic material
Merchandise category material
Hierarchy material
Group material
Merchandise category reference material
Standard material
If the original material in the import file belongs to one of the above
material categories, the system does not create any
follow-up/replacement material relationships.
Check the original material in the import file.
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.
The SAP error message WRF_FOLUPART069 indicates that the original material specified in the import file is a reference material. This typically occurs in the context of material master data management, particularly when dealing with materials that are classified as reference materials in SAP.
Cause: Reference Material: The material you are trying to import is classified as a reference material. Reference materials are typically used for comparison or as a standard, and they may have restrictions on how they can be processed or modified. Data Import Issues: The import file may not be formatted correctly, or it may contain incorrect data that does not align with the expected structure for reference materials. Configuration Settings: There may be specific configuration settings in your SAP system that restrict the use of reference materials in certain transactions or processes.
Solution: Check Material Classification: Verify the classification of the material in the SAP system. If it is indeed a reference material,
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