No error message is shown when trying to add duplicate module to the module lists

[vantemoon]

No details provided by bug reporter.

[nus-se-bot]

Team's Response

No details provided by team.

The 'Original' Bug

[The team marked this bug as a duplicate of the following bug]

The same module can be added as a current, planned, and previous module at the same time.

The same module can be listed as current, planned and previous for the user at the same time.

1. module user curr/CS2100 prev/CS2100 plan/CS2100 rm/ST2334

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_{[original: nus-cs2103-AY2223S1/pe-interim#1923] [original labels: type.FunctionalityBug severity.Low]}

Their Response to the 'Original' Bug

[This is the team's response to the above 'original' bug]

It is written in the developer guide that this is a design decision that we made due to the possibility of remodding.

Items for the Tester to Verify

:question: Issue duplicate status

Team chose to mark this issue as a duplicate of another issue (as explained in the Team's response above)

• [ ] I disagree

Reason for disagreement: [replace this with your explanation]

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:question: Issue response

Team chose [response.Rejected]

• [ ] I disagree

Reason for disagreement: [replace this with your explanation]

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