How To Fix UD403 - & is an entity type, so insertion is not possible

UD403 - Overview

• Message type: E = Error

• Message class: UD - EDM - Enterprise Data Model

• Message number: 403

• Message text: & is an entity type, so insertion is not possible

What causes this issue?

You tried to add a new node to an entity type. This is semantically
incorrect and is, therefore, not allowed. You can refine only data
models, i.e. new nodes can be added only to data model nodes.
The desired operation is therefore not performed.

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UD403 - & is an entity type, so insertion is not possible ?

  The SAP error message UD403 typically indicates that there is an issue related to the insertion of data into a database table or entity type that is not allowed. This error often arises in the context of data management, particularly when working with entities in SAP systems, such as in SAP S/4HANA or SAP Business Suite.
  
  Cause:
  
  Entity Type Restriction: The error suggests that the entity type you are trying to insert data into is not designed to allow direct insertion. This could be due to the entity being a view or a derived entity that does not support direct data manipulation.
  Data Model Constraints: The data model may have constraints that prevent the insertion of new records. This could be due to relationships with other entities or specific business rules defined in the system.
  Authorization Issues: The user may not have the necessary permissions to perform insert operations on the specified entity type.
  Incorrect