DG use cases missing preconditions

[nus-se-script]

Note from the teaching team: This bug was reported during the Part II (Evaluating Documents) stage of the PE. You may reject this bug if it is not related to the quality of documentation.

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For some use cases, preconditions such as user already had musicians in the database were missing

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_{[original: nus-cs2103-AY2324S1/pe-interim#5227] [original labels: severity.Low type.DocumentationBug]}

[wanghejin]

Team's Response

For UC06 as shown in the screenshot, the precondition "User already has the musician details" is implied in MSS step 1. We believe adding such preconditions may be extraneous and duplicative.

Duplicate status (if any):

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