How To Fix 5G199 - Duplicate scheme IDs must all be unique and correspond to T5G30

5G199 - Overview

• Message type: E = Error

• Message class: 5G - HR: Messages for Britain

• Message number: 199

• Message text: Duplicate scheme IDs must all be unique and correspond to T5G30

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 5G199 - Duplicate scheme IDs must all be unique and correspond to T5G30 ?

  The SAP error message 5G199 indicates that there is a duplication issue with scheme IDs in the context of the configuration for the tax calculation or similar processes. This error typically arises when you are trying to create or modify tax schemes in the system, and the scheme IDs you are using are not unique.
  
  Cause:
  The error occurs due to the following reasons:
  
  Duplicate Scheme IDs: You are attempting to create or modify a tax scheme with an ID that already exists in the system.
  Incorrect Configuration: The configuration in the related tables (like T5G30) may not be set up correctly, leading to conflicts in scheme IDs.
  Data Migration Issues: If data has been migrated from another system, there may be duplicate entries that were not cleaned up.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Existing Scheme IDs:
  
  Go to the relevant transaction (e.g., SE11 for Data Dictionary) and check the entries in