UPDATED ITR FY21-22

Hello
Query related to FY 21-22

Original ITR (defective) filed within due date 
Rectification filed after due date (Selected New scheme) within time limit
 

Processed with old scheme 

Demand raised for 80k now

Can we file updated ITR with Old scheme. By selecting old scheme his tax liability is around 20k.

If Updated ITR is processed Demand raised for 80k will be nullified?