How To Fix P0204 - The same key cannot be used for two lines

P0204 - Overview

• Message type: E = Error

• Message class: P0 - Messages for Transactions PE01, PE02 and PE03

• Message number: 204

• Message text: The same key cannot be used for two lines

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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Smart SAP Assistant

• What is the cause and solution for SAP error message P0204 - The same key cannot be used for two lines ?

  The SAP error message P0204, "The same key cannot be used for two lines," typically occurs in the context of document processing, such as when creating or modifying purchase orders, sales orders, or other transactional documents. This error indicates that there is a duplication of key fields in the document lines, which violates the uniqueness constraint required by the system.
  
  Cause:
  
  
  Duplicate Entries: The most common cause of this error is that two or more line items in the document are trying to use the same key fields. This could be due to:
  
  Duplicate material numbers.
  Duplicate account assignments.
  Duplicate item categories.
  
  
  
  
  Configuration Issues: Sometimes, the configuration of the document type or item category may not allow for certain combinations, leading to this error.
  
  
  Data Entry Errors: Manual data entry errors can also lead to the same key being inadvertently assigned to multiple lines.
  
  
  
  Solution:
  
  
  Check for Duplicates: Review the line items in the document to identify any duplicates.