How to set null for type Object in json-schema-to-yup?

Question

JavaScript

Is there a schema for translating in Yup

schema: {
    type: 'object',
    properties: {
      threshold: {
        type: 'object',
        nullable: true
      },
      value: {
        type: 'string',
        nullable: true
      },
    },
    required: ['threshold', 'value'],
  },

Threshold is of type Object, but for some reason nullable doesn't work for it and gives the same error - "threshold must be a `object` type, but the final value was: `null`. If "null" is intended as an empty value be sure to mark the schema as `.nullable()`".
Although for the same value with the String type there are no problems and nullable works.