400
api.unknown_versionapiUnknown API version
Returned by the implementation; no specification rule declares it yet.
The PG-Version header names a version that does not exist or is not served. The detail lists the versions that are.
Why the API refuses
unknown API version; supported versions:
What to do
Pin a dated version you have tested against and change it deliberately — see the changelog for what each one changed. Omitting the header is also fine: you get the default. What you should not do is send a version string built at runtime from today's date.