Message type: E = Error
Message class:  WRF_FOLUPART - Follow-Up/Replacement Material 
Message number: 092
Message text: It is not possible to maintain two identical relationships
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The SAP error message WRF_FOLUPART092 indicates that there is an attempt to maintain two identical relationships for a particular object in the system, which is not allowed. This typically occurs in the context of maintaining relationships between master data objects, such as materials, vendors, or customers, in the SAP system.
Cause: The error arises when: You are trying to create or modify a relationship (e.g., between a material and a vendor) that already exists in the system. The system enforces uniqueness for certain types of relationships, meaning that you cannot have two identical entries for the same relationship type.
Solution: To resolve this error, you can take the following steps: Check Existing Relationships: Navigate to the relevant transaction (e.g., MM02 for material master, or the appropriate transaction for the object you are working with). Check the existing relationships for the object in question to see if the relationship you are trying to create already exists. Modify or Delete Existing Relationships: If
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