Message type: E = Error
Message class:  CMMFSA_SUB_ACCOUNT - Commodity Derivative Order & Trade Execution : Sub Account 
Message number: 160
Message text: Clearing Account Number &1 must be unique
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The SAP error message CMMFSA_SUB_ACCOUNT160 indicates that the clearing account number specified is not unique within the system. This typically occurs in the context of financial accounting or when dealing with sub-accounts in the SAP system.
Cause: Duplicate Entry: The clearing account number you are trying to enter already exists in the system. SAP requires that each clearing account number be unique to avoid confusion and ensure accurate financial reporting.
Configuration Issues: There may be issues in the configuration of the financial accounting module where the same clearing account is mistakenly set up multiple times. Data Migration Issues: If data has been migrated from another system, it’s possible that duplicate clearing account numbers were imported.
Solution: Check Existing Accounts: Verify the existing clearing account numbers in the system. You can do this by navigating to the relevant transaction (e.g., FS00 for G/L accounts) and checking for duplicates. Modify the Account Number: If you find that the account
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