`editm` allows adding of already existing tags

[sun-ruiheng]

To replicate:

1. Have a contact of ic S1234567D with tag diabetic
2. editm ic/S1234567D at/diabetic

Expected: Some kind of warning that it is already an existing allergy. Actual: No warning, goes on as per normal

I think it would be good to have a sort of notice if this occurs, although functionality is not directly impacted at surface level. I can imagine perhaps at a clinic or hospital, this type of stringent warning helps prevent duplicate prescription of medication, for example.

[nus-se-bot]

Team's Response

Yes, this is indeed a problem, but I think the severity should be very low since it does affect the normal usage of the app.

Items for the Tester to Verify

:question: Issue severity

Team chose [severity.VeryLow] Originally [severity.Low]

• [x] I disagree

Reason for disagreement: According to the definition for Low vs VeryLow, this fits Low more.

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