How To Fix ESH_OM_OBJ_MODEL_RP2516 - Key field &4 cannot have semantics "Language Code"

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_OM_OBJ_MODEL_RP2 - Object Model Repository (2)

• Message number: 516

• Message text: Key field &4 cannot have semantics "Language Code"

What causes this issue?

A node key field with semantics "Language Code" cannot be used in the
field mapping of an association or a composition if the node where the
field belongs to has at least one field that is flagged to "Contain
text".
Node key field &v4& is used in the field mapping of the composition
from node &v2& to node &v3& node &v2& of object type &v1& has a field
that is flagged to "Contain text".

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ESH_OM_OBJ_MODEL_RP2516 - Key field &4 cannot have semantics "Language Code" ?

  The SAP error message ESH_OM_OBJ_MODEL_RP2516 indicates that there is an issue with the configuration of a key field in the context of the SAP Enterprise Search (ESH) or the Object Model. Specifically, the error states that a key field cannot have the semantics of "Language Code." This typically occurs when a field that is expected to be a unique identifier or key is incorrectly defined to represent language codes, which are not suitable for key fields.
  
  Cause:
  
  Incorrect Field Configuration: The field in question has been defined with the semantics of a language code, which is not allowed for key fields in the object model.
  Data Model Issues: There may be inconsistencies or misconfigurations in the data model that define how fields are treated, particularly in relation to language-specific data.
  Custom Development: If there has been any custom development or modifications to the object model, it may have inadvertently set a field to have