what can i do, if a user (Role Stock-Manager) deleted a OUT-Stock Picking of a Sale Order?

our Sale Orders have 2 Stock Pickings: Pick and Out.

in one Sale ORder now a user deleted the OUT Picking. The PICK- Picking was already processed but now there is no OUT Picking that can be processed.

So now the quantity_done and qty_to_invoice of the Sale Order will never be updated because of the missing OUT Picking that can not be processed.

What should be done with such Sale Order now?

i tried to manually create a new OUT Stock Picking but it seems that the connection to the Sale-ORder would be missing.