How To Fix CNV765 - Unique secondary index & of table & can cause duplicates.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 765

• Message text: Unique secondary index & of table & can cause duplicates.

What causes this issue?

A unique secondary index was found.

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?

This unique secondary index was saved in table CNVINDEX. It will be
dropped automatically during the conversion and re-created afterwards.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV765 - Unique secondary index & of table & can cause duplicates. ?

  The SAP error message CNV765 indicates that there is a potential issue with a unique secondary index on a database table that could lead to duplicate entries. This error typically arises during data migration or conversion processes, particularly when using SAP's Data Migration tools or during system upgrades.
  Cause:
  The error occurs when:
  
  A unique secondary index is defined on a table, but the data being inserted or migrated contains duplicate values for the fields that make up that index.
  The data being processed does not conform to the uniqueness constraint defined by the secondary index, which can happen if the source data has duplicates or if the transformation logic does not handle duplicates correctly.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Identify Duplicates:
  
  Check the data that is being migrated or processed to identify any duplicates in the fields that are part of the unique secondary index.
  You can use SQL queries or data analysis tools to find duplicates in the source data.
  
  
  
  Data Cleansing:
  
  Once duplicates are identified, you need to decide how to handle them. Options include:
  
  Removing duplicates from the source data.
  Merging duplicate records if applicable.
  Modifying the data to ensure uniqueness (e.g., appending a suffix to duplicate entries).
  
  
  
  
  
  Review Index Definition:
  
  Review the definition of the unique secondary index to ensure it is necessary and correctly defined. If the index is not required, consider dropping it or modifying it to allow for non-unique entries.
  
  
  
  Test Migration:
  
  After cleansing the data, perform a test migration to ensure that the error does not occur again.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration or conversion process you are using. There may be specific guidelines or tools provided by SAP to handle such issues.
  
  
  
  Engage SAP Support:
  
  If the issue persists or if you need further assistance, consider reaching out to SAP support for guidance tailored to your specific situation.
  
  
  
  Related Information:
  
  Unique Secondary Index: A unique secondary index is an index that enforces uniqueness on the indexed fields. It is used to improve query performance and ensure data integrity.
  Data Migration Tools: SAP provides various tools for data migration, such as SAP Data Services, SAP S/4HANA Migration Cockpit, and others. Each tool may have specific features and requirements regarding data integrity and uniqueness.
  Data Quality: Ensuring data quality before migration is crucial. Implementing data validation and cleansing processes can help prevent such errors.
  
  By following these steps, you should be able to resolve the CNV765 error and ensure a smooth data migration process.