Message type: E = Error
Message class:  FINS_FI_SIF - SAP S/4HANA Finance: Subsequent Implementation of Functions 
Message number: 215
Message text: Only one target ledger can be added to the project ID
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The SAP error message FINS_FI_SIF215 indicates that you are trying to add more than one target ledger to a project ID in the SAP system, which is not allowed. This error typically occurs in the context of Financial Accounting (FI) and is related to the configuration of ledgers in the system.
Cause: The primary cause of this error is that the system is designed to allow only one target ledger to be associated with a specific project ID. When you attempt to add a second target ledger to the same project ID, the system triggers this error message to prevent the configuration from being invalid.
Solution: To resolve this error, you can take the following steps: Check Existing Configuration: Go to the configuration settings for the project ID in question and verify which target ledger is currently assigned. Ensure that you are not trying to add a second ledger to the same project ID. Modify Project ID: If you
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