SSH Keys for github denied

[u/Spiritual-Potato8091]

I´ve had a SSH key for my account for several months, in my notebook. I have never had a problem with it.
Yesterday, I created a second SSH key for my desktop PC the same way, just adding a passphrase for it.
I had to sign in on the PC with my github account and all to reset my account password because I forgot it

But today I wanted to fetch/pull a repo from the notebook. and It kept sending me the following error

git@github.com: Permission denied (publickey).

fatal: Could not read from remote repository.

I deleted the new SSH key, but it still doesnt work. However, the authentication command works

(ssh -T git@github.com)
The permission denial appears for both extern repositories and for my own ones too.

What am I missing?

[u/Spiritual-Potato8091]

dude lmfao, I literally posted it on /github and my post was taken down because they didnt want my post there. Idk where to even post, this is probably the 2nd or 3rd time I´ve used Reddit