Changing Accounting Periods setup post Go-Live

Summary:

Changing Accounting Periods post Go-Live

Content (required):

Customer is using same accounting and project accounting periods (monthly calendar)

Now, for Forecasting reasons wants to change the project accounting calendar to weekly calendar.

Is it possible and supported to change now the setup in the Configure Project accounting Business Function to use different accounting and project accounting periods from now on?

If it is possible, what is the impact of the change ?

Thank you,

Costin