A 50 yrs old male underwent RT sided laparoscopic pyelolithotomy with pyeloplasty for RT sided Pelvic-Ureteric Junction (PUJ) obstruction with stone 8 yrs back. The renogram suggested left sided functional obstruction with complete lasix washout.

Now presented with left kidney multiple calyceal stone with functional obs with complete lasix washout . What is the management of this scenario?