Trying to make a copy of a watermelon object but keep referencing the original, and seems that persist in database

[ademarsj]

When i was trying to make a selectable list i bring the objects of DB and added a new attribute called 'isSelected', however, when i call the "find()" in my update method in controller he brings to me the object with the "isSelected" even me not performing other action on the database, in my knowledge of javascript the rest/spred operator doesn't preserve the reference to the original object but make a copy of him.

Does it have an explanation or error in my logic ?

Modifying the objects:

   let listUsers = await userController.getAll();
    listUsers = listUsers.map(item => ({
      ...item,
      isSelected: false,
    }));
    //works well
    setUsers(listUsers); //state "users" of my component

The UserController:

class UserController {
  async create(usr) {
    await database.action(async () => {
      await this.collection.create(user => {
        user.username = usr.username;
        user.password = usr.password;
      });
    });
  }

  async update(usr, id) {
    await database.action(async () => {
      const user = await this.collection.find(id);
      // here the "user" comes with "isSelected"
      await user.update(userMod => {
        userMod.username = usr.username;
        userMod.password = usr.password;
      });
    });
  }

  async getAll() {
    const users = await this.collection.query().fetch();
    return users;
  }

  constructor() {
    this.collection = database.collections.get('users');
    //or database.get('users');
  }
}

export default UserController;