The frontmatter (note: Frontmatter) type contradicts the type (note: Type) given by the file suffix (14 passages, no note). The tool reports (47 passages, no note) rather than guesses.
Check (note: Check) E-TYPE-CONFLICT, severity (note: Severity) error (29 passages, no note) by default, documented with a before and after example in the check pages. The severity can be overridden per project (note: Project) or per repository (note: Knowledge repository).