Add allergen does not work for some ingredients

[nus-pe-bot]

Unable to add certain ingredients as allergen. Not sure if there is a list of pre-defined allergens that users have to follow, but cant seem to find it any where in the user guide

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_{[original: nus-cs2113-AY2223S2/pe-interim#2393] [original labels: type.FunctionalityBug severity.High]}

[jingyaaa]

Team's Response

This ingredient is not considered a valid ingredient in our program as of version 2.1.

It is clearly stated in the user guide what the user can do to see a list of ingredients considered as valid in our program, as such the error message is easily interpretable by the users.

Since the ingredient is not a valid ingredient in our program yet, there are also no recipes that would include these ingredients, hence it would also be unnecessary to add that ingredient and this would not affect the usage of our program.

Duplicate status (if any):

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