What Happens When Deploying a Constant That Already Exists in Test?

In the Test environment, suppose a constant named PV_TXT_TEST already exists. Now, if I create a new constant in the development environment with the same name (PV_TXT_TEST) and deploy it to the Test environment, what will actually happen during deployment? Will Appian throw an error saying that the constant already exists, or will it overwrite the existing one?

This scenario came up in one of my interviews. In my current project, I don’t have permission to deploy to the Test environment, so I wanted to understand what the actual behavior would be.”