SAP Message USMD1028 - Data model &1, &2 &3: Selected name invalid; adhere to naming convention

Diagnosis
The names of entity types, attributes, relationships, and hierarchyattributes must fulfill the following prerequisites:

  • The names must start with a letter, but not with USMD or MDG_.

  • They can only contain digits, letters, and '_' (underscores).

  • The strings MANDT, LANGU, SID, TXTLG, TXTMI, and TXTSH must not
    • be used.

    System Response
    The data model cannot be saved.

    Procedure
    Use a name that fulfills the aforementioned prerequisites.