How To Fix E0859 - EDI: Key fields are not unique, IDoc saved anyway

SAP Error Message - Details

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 859

• Message text: EDI: Key fields are not unique, IDoc saved anyway

What causes this issue?

IDoc &v1&, which was transferred in internal tables, could not be
retrieved completely. At least one key field in &v2& has a double key.
The IDoc was retrieved without the duplicated records.

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 E0859 - EDI: Key fields are not unique, IDoc saved anyway ?

  The SAP error message E0859, which states "EDI: Key fields are not unique, IDoc saved anyway," typically occurs during the processing of IDocs (Intermediate Documents) in the context of Electronic Data Interchange (EDI). This message indicates that the key fields of the IDoc being processed do not have unique values, which can lead to potential issues in data integrity and processing.
  Cause:
  
  Duplicate Key Fields: The IDoc contains key fields (like the document number, customer number, etc.) that are not unique. This can happen if the same IDoc is being processed multiple times or if there are multiple records with the same key values in the source data.
  Configuration Issues: There may be issues with the configuration of the IDoc type or the associated message type, leading to incorrect handling of key fields.
  Data Quality Issues: The source system may have data quality issues, resulting in duplicate entries being sent in the IDoc.
  
  Solution:
  
  Check for Duplicates: Review the data being sent in the IDoc to ensure that there are no duplicate entries for the key fields. This may involve checking the source system or the data extraction process.
  Adjust IDoc Configuration: If the IDoc type or message type is incorrectly configured, you may need to adjust the settings in the IDoc configuration to ensure that key fields are defined correctly and that uniqueness is enforced.
  Error Handling: Implement error handling mechanisms to manage situations where duplicates are detected. This could involve logging the duplicates for further analysis or implementing business rules to handle them appropriately.
  Data Cleansing: If the issue is due to data quality, consider implementing data cleansing processes in the source system to prevent duplicates from being created in the first place.
  Consult Documentation: Review SAP documentation related to the specific IDoc type and message type to understand the expected behavior and any constraints regarding key fields.
  
  Related Information:
  
  IDoc Monitoring: Use transaction codes like WE02 or WE05 to monitor IDocs and identify any issues related to duplicates or processing errors.
  SAP Notes: Check for relevant SAP Notes that may address specific issues related to the E0859 error message or provide guidance on best practices for IDoc processing.
  Custom Development: If necessary, consider custom development to handle specific business logic related to IDoc processing, especially if duplicates are a common occurrence in your business processes.
  
  By addressing the root cause of the duplicate key fields and ensuring proper configuration and data quality, you can mitigate the occurrence of the E0859 error message in your SAP system.