Revised return issue getting acknowledgement number problem

Hi Experts,

One of my friend has weird problem he filed original returns and revised that return after short time and did mistake again we did it online both the times.

Now we got Communication of proposed adjustment u/s 143(1)(a) , after accepting and trying to file revised returns it is throwing error as invalid acknowledgement number please retry.

Please suggest how to proceed for re-revised retrun after 143(1)(a), we are trying to submit under 135(5),  what is the acknowledgement number we need to use, original or revised to submit for re-revised retrun.

Thanks,

Raghu