SSH key usage

Hi everyone,

I have the following problem:

I created an SSH key pair for a repository. The key pair works perfectly for an existing project in the repository. I have now created a new project within the repository. When trying to perform any operations for this new project, I always get asked for my credentials. The “ssh -T” (replacing address with the one of the repository in question) correctly returns “Welcome to GitLab, @MyUserName!”.

Can someone lead me in the right direction how to fix / assess this problem?

Many thanks,