I would like to add more data in an existing map field in firebase this is my helper function bellow:

(am aslo adding a screenshot from my database)

export const handleUpdateCalendar = ({ calendarTracker }) => {
  return new Promise((resolve, reject) => {
    firestore
      .collection("users")
      .doc(firebase.auth().currentUser.uid)
      // .get()
      // .ref(`calendarTracker`)
      .update({ calendarTracker })
      // .update({ calendarTracker })
      // .update({ injuries: injuries })
      // .update({ gear: gear })

      .then((snapshot) => {
        const usersArray = snapshot.docs.map((doc) => {
          return {
            ...doc.data(),
            documentID: doc.num,
          };
        });
        resolve(usersArray);
      })
      .catch((err) => {
        reject(err);
      });
  });
};