It's a problem downstream. Integrators weren't forced to include a version number for v1, so the rework overhead to use v2 will be higher than if it was present in your scheme to begin.

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pixl97 3 days ago | parent | next [-]

This here, it's way easier to grep a file for /v1/ and show all the api endpoints then ensure you haven't missed something.

	▲	andix 2 days ago \| parent \| next [-]
		Edit: ^/api(/(?!v[0-9]).)?$ is v1 ^/api/v2(/.)?$ is v2 It's really not an issue in any case, it just itches your brain, because is not as neat as you would like it to be.
	▲	cmcconomy 3 days ago \| parent \| prev [-]
		grep for /* and omit /v2 ?

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andix 2 days ago | parent | prev [-]

Switching to an incompatible/breaking API requires some rework anyway. The consumer of an API usually doesn't support multiple versions in parallel.