How To Fix EK284 - A different lot with key & already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: EK - IS-U Accounts Receivable and Payable

• Message number: 284

• Message text: A different lot with key & already exists

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?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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 EK284 - A different lot with key & already exists ?

  The SAP error message EK284 ("A different lot with key & already exists") typically occurs in the context of inventory management or materials management when you are trying to create or update a lot for a material that already has a lot with the same key in the system. This can happen during various transactions, such as goods receipt, inventory adjustments, or when managing batch-managed materials.
  Cause:
  
  Duplicate Lot Entry: The error indicates that there is already a lot with the same key (e.g., material number, plant, storage location, and batch number) in the system.
  Incorrect Data Entry: The data being entered may not match the existing lot, leading to a conflict.
  Batch Management Settings: The material may be set up for batch management, and the system is enforcing uniqueness for lot numbers.
  
  Solution:
  
  Check Existing Lots: Use transaction codes like MB52 (List Warehouse Stocks on Hand) or MSC3N (Display Batch) to check if the lot you are trying to create already exists in the system.
  Use a Different Lot Number: If the lot number you are trying to use is already taken, consider using a different lot number that does not conflict with existing entries.
  Review Batch Management Settings: Ensure that the batch management settings for the material are correctly configured. You may need to consult with your SAP MM (Materials Management) or WM (Warehouse Management) team.
  Data Consistency Check: Ensure that the data being entered is consistent with the existing records. Check for any discrepancies in the material master data.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance related to your version of SAP.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MB1A, MB1B, MIGO, and MBRL for goods movements and batch management.
  Batch Management: Understand how batch management works in SAP, including the configuration of batch numbers and their uniqueness.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Authorization: Ensure that you have the necessary authorizations to create or modify lots in the system.
  
  If the issue persists after trying the above solutions, it may be beneficial to involve your SAP support team or consult with an SAP expert for further assistance.