How To Fix D0803 - &: Key values occur more than once in table &

D0803 - Overview

• Message type: E = Error

• Message class: D0 - Machine-level ABAP/4 Dictionary texts (e.g. debugging)

• Message number: 803

• Message text: &: Key values occur more than once in table &

What causes this issue?

This is an internal error.

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?

Please contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.

D0803 - Details

• The SAP error message D0803, which states "Key values occur more than once in table &," typically indicates that there is a violation of the uniqueness constraint for a key field in a database table. This error occurs when an attempt is made to insert or update a record in a table where the key value already exists, leading to duplicate entries.
  
  Cause:
  
  Duplicate Key Values: The most common cause is that the key value you are trying to insert or update already exists in the table.
  Data Integrity Issues: There may be issues with data integrity, such as incorrect data being imported or migrated into the system.
  Concurrency Issues: If multiple users or processes are trying to insert or update records simultaneously, it may lead to conflicts.
  Incorrect Logic in Custom Code: If there is custom ABAP code or enhancements that manipulate data, it may inadvertently create duplicates.
  
  
  Solution:
  
  
  Check Existing Records: Before inserting or updating