Problems achieving required result of using the spread (...) operator with state object

Question

I have a pimRegistration state initialization as shown in the chrome redux-devtools screen capture below. The nesting being referenced is pimRegistration (state.domain.patient):

I updated the patient.name object with the following spread operator statement:

store.update((state) => ({
  ...state,
  ...patientPath,
  ...{ [property]: value },
}));

...where property is the "name" property of the patient object with value. After the update, the following screenshot shows the new state:

Note that the original patient object (purple in the screenshot) is updated with the name object, duplicated and placed at the root of the state (yellow in screenshot).

I would like to overwrite the properties of the pimRegistration(state).domain.patient object, not to create a new patient object.

The state update is called as shown below.

store.update((state) => ({
  ...state,
  ...patientPath, // state.domain.patient
  ...{ [property]: value },
}));

I have tried my different combinations without achieving the desired result.

---

The complete update function is shown below.

update(property: string, path: string, value: any) {
  const paths: string[] = path.split(".");

  const pathReducer = (state: IRegistrationState, path_: string) => {
    if (paths.length <= 0) {
      return state.domain;
    }
    return state[path_];
  };

  const domainPath = state.domain;
  let patientPath, nokPath, referrerPath;

  if (path.includes("patient")) {
    patientPath = paths.reduce(pathReducer, state);
  }

  if (path.includes("nok")) {
    nokPath = paths.reduce(pathReducer, state);
  }

  if (path.includes("referrer")) {
    referrerPath = paths.reduce(pathReducer, state);
  }

  store.update((state) => ({
    ...state,
    ...patientPath,
    ...{ [property]: value },
  }));
}

The function above is invoked with the following statement in Angular 2.

if (this.path.includes("patient")) {
  this._repo.update("name", "domain.patient", this.name);
}

Thanks