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API design and development is the most crucial task for a backend developer. API versioning is one of the most common solutions to this problem. Most of the time it’s an afterthought during the development process whereas it should be the foremost part when starting to design an API. When to version your API is when there are chances that any new change may complicate or break the existing system. The crux of the matter is that it is necessary to always version your APIs to ensure that the developers have a clear and concise way to consume your ever-changing and up-to-date APIs.