According to NPCI, "In case of change in bank account, customer is not required to convey the bank account details or change in bank details to the Government Department or Agency".
I couldn't find a reasonable answer but according to NPCI system, it will try to credit the next payment to your ICICI account which is cancelled and effectively not existed. That transaction will be failed. In such situation, they will check whether the account is active or not. If not, it will check which account is currently linked with your aadhaar number. Then it should go to your previous bank account. NPCI system validate only your aadhaar number and IIN (Institution Identification Number), not your bank account. Once NPCI mapper updated, your data will be updated to previous bank account.
To get to know result, presumably you have to wait upto two months.