Why can't I connect to git via ssh?

Question

git

Hello. I recently tried to upload my project to git, but it gave me an error:
"Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists."
Accordingly, after reading, I got into GitGUI, generated a new ssh key and added it to gitlab. After that, the project started right away.
Now I'm writing another one, I'm pushing - it won't let me in with the same error. I check the ssh key - in place. I check on gitlab - on the spot. I check them, I try to copy and paste again - it says that there is already one.
And with all this, I just successfully pushed into the first project ..

Answer 1

tynts (this is if you are not deceiving us about the keys)