How To Fix USMD1028 - Data model &1, &2 &3: Selected name invalid; adhere to naming convention

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 028

• Message text: Data model &1, &2 &3: Selected name invalid; adhere to naming convention

What causes this issue?

The names of entity types, attributes, relationships, and hierarchy
attributes must fulfill the following prerequisites:
The names must start with a letter, but <zh>not</> with USMD or MDG_.
They can only contain digits, letters, and '_' (underscores).
The strings MANDT, LANGU, SID, TXTLG, TXTMI, and TXTSH must <ZH>not</>
be used.

System Response

The data model cannot be saved.

How to fix this error?

Use a name that fulfills the aforementioned prerequisites.

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.