How To Fix FDT_CORE491 - Data objects that are part of a bound data structure cannot be unbound

FDT_CORE491 - Overview

• Message type: E = Error

• Message class: FDT_CORE - Formula & Derivation Tool: Core

• Message number: 491

• Message text: Data objects that are part of a bound data structure cannot be unbound

What causes this issue?

You have tried to remove the binding relationship of the current data
object to the corresponding object in the ABAP Dictionary (DDIC).
However, for this data object, the following applies:
The data object is bound to an object in the ABAP Dictionary.
The data object is referenced by a structure that is also bound to a
structure in the Dictionary.
In this constellation, the system prevents partial modifications to the
binding relationships in order to properly reflect the original
relationships between the bound objects in the Dictionary.

System Response

The binding of the data object cannot be changed.

How to fix this error?

If it is important for you to have another data object with the same
properties, but without binding, copy the current data object and remove
the binding from the copy.

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.

FDT_CORE491 - Details

• The SAP error message FDT_CORE491 indicates that there is an issue with data binding in the context of SAP's Flexible Data Import (FDI) or Flexible Data Transfer (FDT) framework. Specifically, this error occurs when you attempt to unbind data objects that are part of a bound data structure. 
  
  Cause:
  The error typically arises in the following scenarios:
  
  Data Structure Binding: You are trying to unbind a data object that is part of a data structure that has already been bound. In FDT, once a data structure is bound to a data object, you cannot unbind individual components of that structure.
  Incorrect Configuration: There may be a misconfiguration in the data model or the way the data objects are defined and bound.
  Data Model Changes: If there have been changes to the data model or the structure of the data objects, it may lead to inconsistencies that trigger this error.
  
  
  Solution:
  To resolve the FDT_CORE491 error, consider