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

[adrianhowchin]

We have flagged this as an issue with product, but at this point we do not have capacity to assign an engineer to resolve the issue. We'll keep the issue open, but unfortunately we can not provide any guidance as to when it will be resolved.

[KennethBates]

Another report (private): https://octopus.zendesk.com/agent/tickets/240659