Message type: E = Error
Message class:  WRF_CHAR_VAL - Messages for Package WRF_CHARACTERISTIC_VALUE_GRP 
Message number: 124
Message text: Characteristic &1 already exists
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Certainly! Here's a detailed explanation for the SAP error message: SAP Error Message: WRF_CHAR_VAL124 - Characteristic &1 already exists
Cause: This error occurs when you try to create or assign a characteristic value that already exists in the system. In SAP, characteristics are used in classification and variant configuration, and each characteristic value must be unique within the context of that characteristic. For example, if you attempt to create a characteristic value "Red" for the characteristic "Color," but "Red" already exists as a value for "Color," the system will throw this error. When does it typically occur? During creation of characteristic values in transaction CT04 (Create Characteristic Value). When uploading or mass-maintaining characteristic values via batch input or LSMW. When assigning characteristic values in variant configuration or classification. When customizing or maintaining classification data.
Solution: Check Existing Values: Go to transaction CT04. Enter the characteristic name. Check the list of existing characteristic values. Confirm if the value you are trying to create already exists. Use Existing Value: If
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