X_SCHEMA_DEFAULT_INVALID

a schema default fails its own schema

.default(value) where value is one the schema itself refuses — t.number.min(5).default(1). An omitted field then parsed to a value the same schema rejects when it is sent, and the published JSON Schema stated a default that violates its own bounds, so it is refused where it is WRITTEN, at the first import of the authoring file

edit the .default(…) named in the stack so its value satisfies the rule quoted in cause, or relax that rule on the schema — then bun test <the authoring file>.test.ts