In Advanced Sales Forecasting, the source type is set to "Default."

We have enabled the features of the Advanced Sales Forecasting module with Predictive Planning selected. However, when we try to import the Actual CY Bookings into the application, the Source type selection is set to "Default" instead of "Planning."

Why is this happening, and what modifications do we need to make so that the source type shows as "Planning" and we can import the data to see the forecast running? If we proceed with the current settings, will it cause any issues? Please guide us.