When I checked the ssh connection to GitLab, I found that Permission denied (publickey).

Problems you are having

I get an error when I try to use ssh to connect to Gitlab's repository, which should have been connected and pushed before.

 [vagrant@localhost~]$ ssh-T [email protected]
Permission denied (publickey).

What I've done to solve

https://qiita.com/redamoon/items/07e445d1fce360cb5fa3
↑Re-create public and private keys by referring to this article

 [vagrant@localhost~]$ ssh-keygen-C "Address at Login ス@fuga.com" - trsa

Edit ~/.ssh/config as follows

Host gitlab  
    HostName gitlab
    User git
    IdentityFile through /.ssh/id_rsa

Display the public key (id_rsa_pub) and copy "ssh-rsa ~ just before email address" and add a new one in Gitlab SSH Keys settings

Connection check results in the first error

[[email protected]]$ssh-T [email protected]
Permission denied (publickey).

The public and private keys created above have keys created with the same name before, so

/home/vagrant/.ssh/id_rsa already exists.
Overwrite(y/n)?y

↑ Overwrite and recreate here

I can't figure out the cause of this error or how to solve it, so I'm at a loss...
It would be very helpful if you could tell me the cause and the solution.Thank you for your cooperation.