How to change the remote name 'origin' to a different one?

[xferroMinsait]

We don't have the [remote "origin"] tag in the .git/config file
We have a different remote name (<> than "origin") (we renamed it recently)
We defined this remote using VS 2017:

When we try to publish a feature to the remote server (for instance), we get this error:

We tried to remove the [gitflow] tags of the .git/config file in order to re-initialize the GitFlow tool. With no success.

We want to rename the remote because we will have two different remote servers (we will use gitflow always with one of them (the "development server") and push the master branch after the releases to the customers' server). Obviously, we can still use 'origin' for the "development server"... :-)