Delinquency fee calculation, first time run

Since Go Live, my client has been manually calculating Late Fees payable. They would like to use the Delinquency Fee functionality but my Last Fee Date (LFCJ) in Customer Ledger (F03B11) is blank. This causes JDE to calculate late fees based on Due date (for open invoices) or Receipt date (for late paid invoices). Would it be safe to SQL a valid date into this field (the date the last manual fee calculation was done) just to get the first fee calculation correct? Thanks!!