How To Fix E!009 - Line &: Key exists once more

E!009 - Overview

• Message type: E = Error

• Message class: E! -

• Message number: 009

• Message text: Line &: Key exists once more

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message E!009 - Line &: Key exists once more ?

  The SAP error message E!009 "Line &: Key exists once more" typically occurs when there is an attempt to insert or update a record in a database table where a unique key constraint is violated. This means that the key you are trying to insert already exists in the database, and the system does not allow duplicate entries for that key.
  
  Cause:
  
  
  Duplicate Key Entry: The most common cause is that the data you are trying to enter already exists in the database table. This could be due to:
  
  Manual data entry errors.
  Data being imported from another system or file that contains duplicates.
  A process that is trying to create a record that already exists.
  
  
  
  Incorrect Logic in Custom Code: If there is custom ABAP code or a user exit that is not properly checking for existing records before attempting to insert a new one, this can lead to this error.
  
  
  Data Migration Issues: During data