Error when creating JSONSchema from Schema.Record with Schema.Number as key

Is it expected that i can not make a JSONSchema from

Schema.Record({ key: Schema.Number, value: Schema.String }

Schema.Record({ key: Schema.Number, value: Schema.String }

when using

Schema.Number

Schema.Number

const f = JSONSchema.make(Schema.Record({ key: Schema.Number, value: Schema.String }))
console.log(f)

const f = JSONSchema.make(Schema.Record({ key: Schema.Number, value: Schema.String }))
console.log(f)

gives me:

Unsupported key schema
schema (NumberKeyword): number`

Unsupported key schema
schema (NumberKeyword): number`