Github “fatal: remote origin already exists”错误

新建一个Gitlab project，准备将本地Git项目上传到Gitlab时，报本地项目之前已经绑定到了另外一个项目，想起来当时是在Gitlab中clone别人的项目到本地，因此需要重新设置绑定，将项目绑定到新建的project上，从网上看到解决方案于是罗列在下面：

TL;DR you should just update the existing remote:
$ git remote set-url origin [e-mail]:ppreyer/first_app.git

Long version:

As the error message indicates, there is already a remote configured with the same name. So you can either add the new remote with a different name or update the existing one if you don't need it:
To add a new remote, called for example github instead of origin (which obviously already exists in your system), do the following:
$ git remote add github [e-mail]:ppreyer/first_app.git
Remember though, everywhere in the tutorial you see "origin" you should replace it with "github". For example $ git push origin master should now be $ git push github master.
However, if you want to see what that origin which already exists is, you can do a $ git remote -v. If you think this is there by some error, you can update it like so:
$ git remote set-url origin [e-mail]:ppreyer/first_app.git

地址：https://stackoverflow.com/questions/10904339/github-fatal-remote-origin-already-exists