How To Fix S~028 - One of the tables contains duplicate keys.

S~028 - Overview

• Message type: E = Error

• Message class: S~ - Repository API Business Navigator

• Message number: 028

• Message text: One of the tables contains duplicate keys.

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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S~028 - Details

• The SAP error message S~028, which states "One of the tables contains duplicate keys," typically occurs when there is an attempt to insert or update records in a database table that has a unique key constraint, and the operation would result in duplicate entries for that key.
  
  Cause:
  
  Duplicate Data: The most common cause is that the data being inserted or updated already exists in the table with the same key values.
  Incorrect Data Handling: There may be issues in the data handling logic, such as not properly checking for existing records before attempting to insert new ones.
  Data Migration Issues: If data has been migrated from another system, it may contain duplicates that violate the unique constraints of the target SAP table.
  Concurrency Issues: In a multi-user environment, two users might be trying to insert the same record simultaneously.
  
  
  Solution:
  
  Identify Duplicates: Use SQL queries to identify existing records in the table that have the same