How To Fix GT838 - Duplicates occurred when inserting in the target table

GT838 - Overview

• Message type: E = Error

• Message class: GT - Database utilities

• Message number: 838

• Message text: Duplicates occurred when inserting in the target table

What causes this issue?

Duplicates that could not be inserted in the target table occurred.
This could have occurred when the key was shortened.

System Response

The original table is not deleted so that the original records are
retained.

How to fix this error?

Check the data in the target table. If it does not correspond to your
expectations, this could have been caused by not inserting duplicates.
Please contact the SAP hotline.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GT838 - Duplicates occurred when inserting in the target table ?

  The SAP error message GT838, which indicates that "Duplicates occurred when inserting in the target table," typically arises during data transfer or data migration processes, particularly when using tools like SAP Data Services, SAP BW, or during ETL (Extract, Transform, Load) operations. This error suggests that the system is attempting to insert records into a target table that already contains duplicate entries based on the defined primary key or unique constraints.
  Causes:
  
  Duplicate Data in Source: The source data may contain duplicate records that violate the uniqueness constraints of the target table.
  Incorrect Data Mapping: The mapping between source and target tables may not be correctly defined, leading to unintended duplicates.
  Concurrency Issues: Multiple processes may be trying to insert the same data simultaneously, causing conflicts.
  Data Transformation Errors: During the transformation phase, data may be altered in a way that creates duplicates.
  Missing or Incorrect Keys: The primary key or unique constraints in the target