How To Fix DT143 - Key field &: Decimal places must not be changed

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 143

• Message text: Key field &: Decimal places must not be changed

What causes this issue?

You have changed the decimal places for field &1. This is not allowed
in support package systems.

System Response

The table will not be activated.

How to fix this error?

Remove the change.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT143 - Key field &: Decimal places must not be changed ?

  The SAP error message DT143 ("Key field &: Decimal places must not be changed") typically occurs when there is an attempt to modify the decimal places of a key field in a data structure or table that is not allowed. Key fields in SAP are critical for data integrity and consistency, and changing their decimal places can lead to issues in data retrieval and processing.
  Cause:
  
  Modification of Key Fields: The error is triggered when a user or a program tries to change the decimal places of a field that is defined as a key field in a database table or structure.
  Data Dictionary Constraints: SAP enforces strict rules on key fields to maintain data integrity. Key fields are often used in indexing and relationships between tables, and changing their properties can lead to inconsistencies.
  Data Type Mismatch: If there is an attempt to assign a value with a different number of decimal places to a key field, this error may occur.
  
  Solution:
  
  Check Field Definition: Review the data dictionary (SE11) for the table or structure in question. Ensure that the decimal places for the key field are correctly defined and that you are not trying to change them.
  Avoid Changing Key Field Properties: If you need to change the decimal places for a field, consider whether it can be done on a non-key field instead. If the key field must be changed, you may need to create a new field or table.
  Data Migration: If you are migrating data or making changes to existing data structures, ensure that the data being migrated adheres to the existing definitions of key fields.
  Consult Documentation: Refer to SAP documentation or consult with your SAP Basis or ABAP team for best practices regarding changes to key fields.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary) to view and modify table definitions.
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message.
  Development Guidelines: Follow SAP development guidelines to avoid issues related to key fields and data integrity.
  Testing: Always test changes in a development or quality assurance environment before applying them to production.
  
  If the issue persists after following these steps, it may be beneficial to engage with SAP support or your internal SAP team for further assistance.