cancel open WTs and re-create later

All,

We are performing an ad-hoc PI process at our client's warehouse. This is completely manual and no RF guns are used. So the requirement is to close all open WTs before starting the PI process and once complete re-create them. Is this possible with SAP EWM?

I know we can cancel all WTs using SCWM/MON transaction, but please let me know what is the best way to re-create WTs. Your response will be greatly appreciated. Thanks in advance.

Sareen.