How To Fix TR171 - Field & is not a key field

TR171 - Overview

• Message type: E = Error

• Message class: TR - Change and Transport System

• Message number: 171

• Message text: Field & is not a key field

What causes this issue?

The field "&V1&" does not exist in table "&V2&" or is not a key field.

System Response

The entry was not accepted.

How to fix this error?

Check the spelling of the field name.

Error message extract from SAP system. Copyright SAP SE.

TR171 - Details

• The SAP error message TR171, which states "Field & is not a key field," typically occurs in the context of data transport or when working with table definitions in the SAP system. This error indicates that a field you are trying to use as a key field in a transport request or a data operation is not defined as a key field in the relevant database table.
  
  Cause:
  
  Field Definition: The field you are trying to use is not defined as a key field in the table's structure. Key fields are essential for uniquely identifying records in a database table.
  Transport Request Issues: If you are trying to transport a table or structure that includes a non-key field as a key field, this error will occur.
  Data Dictionary Changes: If there have been recent changes to the data dictionary (like adding or modifying fields), the system may not recognize the field as a key