Initial state:

> uv --version
uv 0.5.14
> cat pyproject.toml | grep required-version
required-version = ">=0.5.15"
> uv sync
error: Required version `>=0.5.15` does not match the running version `0.5.14`

All fine so far, but:

> uv self update
error: Required version `>=0.5.15` does not match the running version `0.5.14`

so the obvious way to fix the uv-is-too-old problem doesn't work :) Naturally this is easily worked around by cd-ing to a different directory, but it seems likely to me that blocking uv self wasn't intended!

I've also tried the same thing after upgrading to uv 0.5.15, and changing required-version to >=0.5.16, just to check whether the issue had been fixed already.

(Aside: it might also be useful if the error message said "Required uv version...". I can imagine a user who didn't add the uv version bound constraint potentially being confused about what is actually binding.)