SHABDKOSH

tumhe ye baat bhool gani chahiye mein tum se is baat ke liye maaphi mang chuki hu.

you should forgive this talk. I already apologized you for this talk.

@khandelwal.shweta,
‘talk’ is not always the right translation of ‘baat’. There are also other mistakes in your translation.

@sanchi15,
“You should forget this incident (/matter) now. I have already pleaded forgiveness for it.”

Edit: Yes, you can also use the word ‘apologize’ in the second part as used by khandelwal.shweta. (“I have already apologized for it”.)