How To Fix TK156 - Table & has no key fields

TK156 - Overview

• Message type: E = Error

• Message class: TK - Transport Organizer

• Message number: 156

• Message text: Table & has no key fields

What causes this issue?

The keys for table "&V1&" cannot be specified because this table does
not have any key fields.

System Response

No keys can be specified.

How to fix this error?

Perform this function at table level.

Error message extract from SAP system. Copyright SAP SE.

TK156 - Details

• The SAP error message TK156 indicates that a 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 certain operations, such as updates or deletions, because it cannot determine which record to act upon.
  
  Cause:
  
  Table Definition: The table in question may have been incorrectly defined in the Data Dictionary (SE11). It might have been created without specifying any key fields.
  Transport Issues: If the table was transported from another system, there may have been an issue during the transport that caused the key fields to be lost or not included.
  Development Errors: During the development process, a developer may have inadvertently removed key fields or failed to define them.
  
  
  Solution:
  
  
  Check Table Definition:
  
  Go to transaction SE11 (Data Dictionary).
  Enter the name of the table that is causing the error and click on "Display".
  Check