diff --git a/app.py b/app.py
index 6734e98..30bd1d5 100644
--- a/app.py
+++ b/app.py
@@ -69,7 +69,6 @@ def index():
 @app.route('/select', methods=['GET', 'POST'])
 def selSubUser():
     if check_login_status():
-        print(session)
         session.clear()
         flash("Timeout. 遇時，請重新登入")
         return redirect('/')
@@ -130,7 +129,6 @@ def chgPassword():
                     old['token'] = oldUsr['idToken']
                     data = db.child("Users").child(
                         oldUsr['localId']).get(oldUsr['idToken']).val()
-                    print("data:", data, flush=True)
 
                     auth.delete_user_account(oldUsr['idToken'])
                     delUser = True
@@ -139,6 +137,7 @@ def chgPassword():
                         request.form['new_username'], request.form['new_password'])
                     db.child("Users").child(newUsr['localId']).set(
                         data, newUsr['idToken'])
+                    db.child("Users").child(oldUsr['localId']).remove(oldUsr['idToken'])
                     session.clear()
                     flash(
                         '修改密碼成功，請重新登入<br>Password changed successfully. Please login again.')
diff --git a/upload.py b/upload.py
index 9302742..2d7acbe 100644
--- a/upload.py
+++ b/upload.py
@@ -105,7 +105,6 @@ def upload_gp_classes():
                                         csv_dict.columns[i+1]: tmp_csv[j],
                                         "type": 'group'
                                     }, session['token'])
-                                    accs.remove(allUsers[key]['origUsername'])
                 os.remove(filepath)
             except Exception as e:
                 os.remove(filepath)