How To Fix SMMSS_DDIC004 - There can be only one clustered index

SMMSS_DDIC004 - Overview

• Message type: E = Error

• Message class: SMMSS_DDIC - DDIC Messages for Microsoft SQL Server

• Message number: 004

• Message text: There can be only one clustered index

What causes this issue?

You have set CLUSTERED YES for an index. However, there is already a
clustered index in the database.

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?

If you want this index to be clustered, you must set the currently
clustered index to CLUSTERED NO.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

SMMSS_DDIC004 - Details

• The SAP error message SMMSS_DDIC004 indicates that there is an attempt to create more than one clustered index on a database table. In relational database management systems (RDBMS), a clustered index determines the physical order of data in a table and there can only be one clustered index per table.
  
  Cause:
  The error typically arises in the following scenarios:
  
  Multiple Clustered Index Definitions: When trying to define a second clustered index on a table that already has one.
  Table Redefinition: If a table is being redefined or modified in a way that inadvertently attempts to create a second clustered index.
  Database Migration or Upgrade: During a migration or upgrade process, the system might attempt to create indexes that conflict with existing ones.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Existing Indexes:
  
  Use the database management tools or SQL queries to check the existing indexes on the table. Ensure that there is only one clustered