Prompted variable in library and project set can duplicate

[calverp]

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Prerequisites

• [X] I have verified the problem exists in the latest version
• [X] I have searched open and closed issues to make sure it isn't already reported
• [X] I have written a descriptive issue title
• [X] I have linked the original source of this report
• [X] I have tagged the issue appropriately (area/*, kind/bug, tag/regression?)

The bug

If a variable exists in a library variable set and a project variable set and is set to Prompt, it will appear twice on the deploy screen. The value set in the project variable will still take priority though.

What I expected to happen

Only the project variable should appear on the prompt screen.

Steps to reproduce

1. Create a variable in a library variable set e.g. "PromptTest"
2. Set the variable to Prompt
3. Assign the variable set to a project
4. Create a variable within the project with the same name e.g. "PromptTest"
5. Create a release and deploy
6. Check the prompt variables on deploy screen, "PromptTest" will appear twice

Screen capture

Affected versions

Octopus Server: 2020.5.0

Workarounds

This is mainly a UI issue, the behaviour of the variables remain the same i.e. the project variable will override the library variable

Links

https://help.octopus.com/t/variable-override/25917