1879399 - Duplicate Material Master entries appear

• It looks like two Materials have the same Material number which is not possible.
• Duplicate Products are displayed in the app "Create Material" , "Change Material" , "Display Material" and "Manage Product Data" app but known why 

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.

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• SAP ERP Logistics (LO) 
• SAP R/3 
• SAP R/3 Enterprise 
• SAP ERP Central Component 
• SAP ERP 
• SAP Enhancement package for SAP ERP 
• SAP Enhancement package for SAP ERP, version for SAP HANA 
• SAP S/4HANA, on-premise
• SAP S/4HANA, cloud edition

SAP ERP Central Component all versions ; SAP ERP all versions ; SAP R/3 Enterprise all versions ; SAP R/3 all versions ; SAP S/4HANA all versions ; SAP enhancement package for SAP ERP all versions ; SAP enhancement package for SAP ERP, version for SAP HANA all versions

identical materials Material, Materialnummer, unsichtbare Zeichen, identische Materialien, SE16, SE16N, MARA   , KBA , LO-MD-MM , Material Master , LO-MD-FIO-MM , Fiori UI for Product Master , Problem