How To Fix TK318 - No key fields are defined for table &1

TK318 - Overview

• Message type: E = Error

• Message class: TK - Transport Organizer

• Message number: 318

• Message text: No key fields are defined for table &1

What causes this issue?

No key was defined for table &V1& in the ABAP Dictionary. Processing
by key is therefore not possible.

System Response

The function terminates.

How to fix this error?

Check the table definition in the ABAP Dictionary and the link between
your function and the Transport Organizer.
If the error occurs in a customer system, contact the Hotline Service
for the application where the error occurred.

Error message extract from SAP system. Copyright SAP SE.

TK318 - Details

• The SAP error message TK318 "No key fields are defined for table &1" indicates that the specified table does not have any key fields defined. Key fields are essential in SAP database tables as they uniquely identify each record in the table. Without key fields, the system cannot perform operations that require unique identification of records, such as updates, deletes, or certain types of queries.
  
  Cause:
  
  Table Definition Issue: The table in question may have been incorrectly defined in the Data Dictionary (SE11). It might be missing key fields, which are necessary for the table's integrity and functionality.
  Transport Issues: If the table definition was transported from one system to another (e.g., from development to production), there may have been an issue during the transport process that resulted in the loss of key field definitions.
  Custom Development: If the table is a custom table created by a developer, it’s possible that the developer forgot