How To Fix RMST1102 - Entry with this key already exists; choose a different one

SAP Error Message - Details

• Message type: E = Error

• Message class: RMST1 - RMS-TLS: Messages

• Message number: 102

• Message text: Entry with this key already exists; choose a different one

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RMST1102 - Entry with this key already exists; choose a different one ?

  The SAP error message RMST1102, which states "Entry with this key already exists; choose a different one," typically occurs when you are trying to create or modify an entry in the system that conflicts with an existing entry. This can happen in various contexts, such as when creating master data, configuration settings, or transactional data.
  Cause:
  
  Duplicate Key: The most common cause is that the key (such as a unique identifier, code, or name) you are trying to use already exists in the database. This could be a material number, vendor code, customer ID, etc.
  Data Entry Error: Sometimes, the error may arise from a simple typographical error where the user mistakenly tries to enter a key that is already in use.
  System Configuration: In some cases, the system configuration may enforce unique constraints on certain fields, leading to this error when attempting to create a new entry.
  
  Solution:
  
  Check Existing Entries: Before creating a new entry, check the existing records to see if the key you are trying to use is already in use. You can do this by searching for the key in the relevant transaction or using the appropriate report.
  Choose a Different Key: If the key is already in use, you will need to select a different key that does not conflict with existing entries. Ensure that the new key adheres to any naming conventions or formats required by your organization.
  Review Data Entry: Double-check your data entry for any mistakes. Ensure that you are not inadvertently trying to create a duplicate entry.
  Consult Documentation: If you are unsure about the key requirements or constraints, consult the relevant SAP documentation or your organization's data governance policies.
  Contact Support: If you believe that the error is occurring incorrectly (for example, if you are certain that the key should not be in use), consider reaching out to your SAP support team or system administrator for further investigation.
  
  Related Information:
  
  Transaction Codes: Depending on the context of the error, you may be using different transaction codes (e.g., MM01 for material creation, XK01 for vendor creation, etc.).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  User Authorization: Ensure that you have the necessary authorizations to create or modify the entries in question, as lack of permissions can sometimes lead to unexpected errors.
  
  By following these steps, you should be able to resolve the RMST1102 error and successfully create or modify the entry you are working on.