--schema value is not a built-in preset name. Preset names come from the built-in
list in the schema system — most often this error is a typo
(standard-bse for standard-semver).
Reproduce
Fix
- Use a built-in preset:
--schema standard-semver,--schema pep440, and the rest of the 22 presets - For anything custom, write a RON schema instead of a preset name: