Message type: E = Error
Message class:  IHC - IHC Messages 
Message number: 024
Message text: Set of rules &1 already exists
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The SAP error message IHC024: Set of rules &1 already exists typically occurs in the context of the SAP Intercompany Harmonization (IHC) module. This error indicates that you are trying to create a new set of rules with an identifier that already exists in the system.
Cause: The primary cause of this error is that the identifier (or name) you are trying to use for the new set of rules is already in use by another set of rules. This can happen if: You are attempting to create a duplicate entry. There was a previous attempt to create a set of rules that was not properly deleted or was left in the system. You are not aware of existing sets of rules that have the same identifier.
Solution: To resolve this error, you can take the following steps: Check Existing Sets of Rules: Navigate to the relevant transaction in SAP where you manage sets of rules (e.g., transaction code
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