How To Fix DT859 - Field & is added to the key of the table

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 859

• Message text: Field & is added to the key of the table

What causes this issue?

The field being processed was added by SAP to the key of the table. It
is added to the end of the key.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT859 - Field & is added to the key of the table ?

  The SAP error message DT859 indicates that a field has been added to the key of a database table. This typically occurs when there is a change in the structure of a table, particularly when a new field is added to the primary key or unique key of the table. This can lead to issues with data consistency, indexing, and performance.
  Cause:
  
  Table Structure Change: The most common cause of this error is that a field has been added to the key of a table, which can happen during a transport of changes or when modifying the data dictionary.
  Data Inconsistency: If there are existing records in the table that do not comply with the new key definition, this can trigger the error.
  Dependent Objects: Other database objects (like views, indexes, or foreign key relationships) may be affected by this change, leading to inconsistencies.
  
  Solution:
  
  Check Table Structure: Review the changes made to the table structure. You can do this by using transaction SE11 (Data Dictionary) to see the current definition of the table and the fields that are part of the key.
  Data Consistency Check: Ensure that all existing records in the table comply with the new key definition. You may need to clean up or modify existing data to ensure that it meets the new constraints.
  Adjust Dependent Objects: If there are views, indexes, or foreign key relationships that depend on the table, you may need to adjust or recreate them to align with the new key structure.
  Transport Request: If the change was made in a development environment, ensure that the transport request is correctly configured and that all necessary objects are included in the transport.
  Testing: After making the necessary adjustments, test the changes in a development or quality assurance environment before moving to production.
  
  Related Information:
  
  Transaction Codes: Use SE11 for Data Dictionary, SE14 for database utility, and SE80 for object navigator to check related objects.
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to the specific error message.
  Documentation: Review SAP documentation on database table management and key definitions for best practices.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.