Activation split valuation: How to delete sales orders and create them again

Hello experts,

We want to activate for a all materials the split valuation. On condition is, that we have no sd-documents for ther material.

So we have any once experinence about such a secario? How should we delte all sales orders and create them again?

I think the critical poin ist, how we should restore the sd-documents, after we activate the split valuation.

how would you create the sales order again, what should we do with reservations? waht should we do with batches in the sales order?

Thanks for help.

Sven