I asked in the discussion:
Sorry It not showing same name
That means somehow the credentials have changed.
One solution would be to at least copy
%HOME%\.ssh\id_rsa.pub in the SSH keys section of the right GitHub account
The OP adds:
I am working on private repo. So In [email protected]:username/repo.git,
If you were able to clone/push to that repo whose username is not your own GitHub account, that must be because you had your previous public ssh key added as a contributor to that repo by the repo’s owner.
What next is to ask that same repo owner to add your current public ssh key
%HOME%\.ssh\id_rsa.pubto the repo contributor list.
So check with the owner that you (meaning your public ssh key) are declared as a contributor.