Message type: E = Error
Message class: NAA - Subsequent settlement (Purchasing)
Message number: 121
Message text: Double index entry for Settl. Mgmt. document &1, item &2 (internal error)
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The SAP error message NAA121, which indicates a "Double index entry for Settl. Mgmt. document &1, item &2 (internal error)," typically arises in the context of Settlement Management in SAP. This error suggests that there is a duplicate entry in the index for a specific settlement document and item, which can lead to inconsistencies in data processing. Causes: Data Integrity Issues: The error may occur due to data integrity problems, such as duplicate entries in the database or inconsistencies in the settlement documents. System Bugs: There may be bugs in the SAP system or specific patches that have not been applied, leading to unexpected behavior. Custom Developments: If there are custom developments or enhancements in the system, they might inadvertently create duplicate entries. Database Issues: Corruption or issues in the underlying database can also lead to such errors. Solutions: Check for Duplicates: Investigate the database for duplicate entries related to the specified settlement document and item. You
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