Message type: E = Error
Message class:  FI - TR-FM Funds Management 
Message number: 307
Message text: Commitment item &/& has a higher level item
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Enter a commitment item which has no superior commitment item.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FI307 indicates that there is a commitment item that is associated with a higher-level item in the financial accounting module. This error typically arises when there is an inconsistency in the hierarchy of commitment items, which are used in budget control and financial planning.
Cause: Hierarchy Violation: The commitment item you are trying to use is defined as a lower-level item in the budget hierarchy, but it is being treated as a higher-level item in the transaction.
Configuration Issues: There may be issues in the configuration of the commitment item hierarchy in the SAP system. Incorrect Assignment: The commitment item may have been incorrectly assigned to a higher-level item in the budget structure.
Solution: Check Commitment Item Hierarchy: Go to the configuration settings for commitment items in the SAP system (Transaction Code: OBBP or SPRO). Verify the hierarchy of the commitment items and ensure that the item you are trying to use is correctly
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