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E0015: Duplicate Enum Variant

An enum definition contains the same variant name more than once.

Example​

enum Status {
    Active,
    Inactive,
    Active,  // Error: variant `Active` appears multiple times in enum `Status`
}

How to fix​

Remove the duplicate variant or give it a unique name:

enum Status {
    Active,
    Inactive,
    Pending,  // OK
}