The GL Ledger Flexfield is a mirror image of the GL Accounting Flexfield with one additional segment: Ledger. It is maintained automatically by the system and is for internal use only. You should not be touching it in any case. It is used for certain GL features such as Mass Allocations, Recurring Journals and FSG Reports. Mostly it is used for looping through the ledgers. This flexfield is created automatically when the corresponding GL chart of accounts gets compiled.