Message type: E = Error
Message class:  FAGL_POSTING - Messages for FAGL_POSTING EhP3 Relating to New Functions 
Message number: 012
Message text: Not poss. to deselect "Clearing Specific to Ledger Grp" ind. subsequently
Postings have already been made to the account. Consequently, there are
already items on the account.
You can <ZH>no longer</> deactivate clearing to specific ledger groups
using this transaction.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FAGL_POSTING012 indicates that you are trying to deselect the "Clearing Specific to Ledger Group" indicator after it has already been set in the system. This situation typically arises in the context of financial postings in SAP, particularly when dealing with General Ledger (G/L) accounts.
Cause: The error occurs because the "Clearing Specific to Ledger Group" indicator is a critical setting that determines how clearing transactions are processed in relation to different ledger groups. Once this indicator is set for a G/L account, it cannot be changed or deselected for that account in the same transaction or posting session. This restriction is in place to maintain data integrity and ensure that the accounting principles are adhered to.
Solution: To resolve this error, you can take the following steps: Check the Account Settings: Review the G/L account settings in the SAP system to confirm whether the "Clearing Specific to Ledger Group" indicator is
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