Debit Note Issue wrong entry

i returned goods to my supplier.
generally supplier furnish debit/credit note entry in Gstr-1.

but i mistakenly entered debit note in my gstr-1

after that my itc comparison got ruined

in following month i amended same debit note, and this time i did as credit.

again my itc is not tallying.

as of now, i am now not able to amend this wrong entry.
because amendment can be made only once.

please suggest me how to do correction.

thanks.