Can not carry forward losses because mistakenly selected 139(4) instead of 139(1)

I filed my tax returns with carry forward losses -  within the due date, but mistakenly selected belated return 139(4) instead of 139(1) for AY 20-21. Now, I got a notification from IT saying that I can't carry forward losses because it filed after due date. Is there any way I can rectify this now and still claim the carry forward losses. What should I reply to the e- proceedings. Thanks