This error means the remote named 'origin' is already set. Either rename it or remove the existing one to re-add it.

The error 'fatal: remote origin already exists' occurs when you try to add a remote with the name 'origin', but Git has already assigned that name to a remote. To check existing remotes, run git remote -v. If 'origin' already points to a URL and you want to replace it, remove the current 'origin' with git remote remove origin, then add the new URL as needed (git remote add origin <url>). Alternatively, assign a different name, such as git remote add new-origin <url>, to maintain multiple remotes. This way, you avoid overwriting existing remotes, preserving flexible connections between repositories.