Block Invoice Forecasting on Schedule for Months that are Finalised

We have noticed that when we have finalised a month on this tab users can still schedule an amount to be invoiced (often accidentally) back in time to a ‘Finalised’ Financial month from the project?
Suggestion is once a month is ‘ finalised’ can this month then be locked to prevent anyone scheduling by mistake back in time?
Just a suggestion as this has happened a few times and causes us a lot of backtracking to make sure projects were actually billed etc.

Accounts wise this would help us immensely.