In order to clone your search, please take the following steps:
go to segments > searches
scroll to the right on the page
click on the 3 dots
Here you can update your LinkedIn Sales Navigator link, search name, user etc.
click clone search
Once that is done, now you'll see your search section has been 'queued' which means your search will begin the next morning. In case you are in rush, please feel free to click on the play button.