BRF+ Dunning - Switching back to Dunning Procedure-based Dunning

Hello Colleagues,

We are implementing BRF+ IS-U Collection Strategy Dunning.

Once we turn on the Business Function for Flexible Dunning and assign the Master Data Grouping level (e.g. at  Contract Account level), can we revert back to the traditional Dunning Procedure-based Dunning?

If so, would it be a Basis task to turn off Flexible Dunning (in addition to blanking out the Master Data Grouping level at Company Code level)?

Your feedback would be appreciated.

Thanks and regards,

Ivor Martin