How To Fix DA604 - New or non-key field & is now key field

DA604 - Overview

• Message type: E = Error

• Message class: DA - Dictionary: Compare, distribution, timer, instantiation

• Message number: 604

• Message text: New or non-key field & is now key field

What causes this issue?

A non-key field was included in the key by selecting the key flag.
After activating the table, this field is now the key field of the
table.

System Response

Information message

How to fix this error?

Changing the key of a table makes it necessary to convert the table.

Error message extract from SAP system. Copyright SAP SE.

DA604 - Details

• The SAP error message DA604 indicates that a new or non-key field is being treated as a key field in a data dictionary object, such as a table or a view. This typically occurs when there is an inconsistency in the definition of the data structure, particularly when a field that was previously defined as a non-key field is now being defined as a key field.
  
  Cause:
  
  Field Definition Change: The field in question has been modified in the data dictionary (e.g., in a table or structure) to be a key field, but it is not properly defined or does not meet the requirements for being a key field.
  Inconsistent Data Model: The data model may have inconsistencies, such as changes in the underlying database or data structure that have not been properly reflected in the SAP data dictionary.
  Transport Issues: If the changes were transported from one system to another (e.g., from development