No document to update - Firebase / Angular

Kod:

   public addEmployee(model: IEmployee) {
        model.id = this.firestore.createId();
        this.firestore.collection('employees').add(model).then(()=>{
          console.log('Added');
        })
    }

Po próbie updatowaniu danych dostaje taki error: core.js:6210 ERROR Error: Uncaught (in promise): FirebaseError: [code=not-found]: No document to update:

Jakieś pomysły?