How to correct b2b invoice filed as b2c large

dear sir

october 2017 i have filed b2b invoice filed as b2 c. invoice no is 101. during september 2018  as per my friend's advice i have amended the invoice no 101 as 101a with spme other changes,it wrongly entered,

now i like to change those invoice it gives a message as A record can be amended only once.Invoice no./Note no.has already been amended in previous tax period.

pl help me out to solve this issue sir

senthil kumar

pondicherry