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kivymd invalid property name error when using root.manager.transition

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When I run the code I get an invalid property name error for the 24th line ("root.manager.transition.direction = 'left'"),

MDScreen:    name:"main"    MDFloatLayout:        md_bg_color: 0.149,0.654,0.352,1    Image:        source: "main_photo_1.png"        pos_hint: {"center_x": .5, "center_y": .65}        size_hint: .5,.5    MDLabel:        text: "'welcome"        font_size: 30        pos_hint: {"center_y": .34}        halign: "center"        color: rgba(34,34,34,255)    Button:        text: ""        size_hint: .66, .065        background_color: 0,0,0,0        Image:            source: "log in.png"            center_x: self.parent.center_x            center_y: self.parent.center_y        on_press:            root.manager.transition.direction = 'left'            root.manager.current = "login"

also, here is the python code:

from kivymd.app import MDAppfrom kivy.uix.screenmanager import ScreenManagerfrom kivy.core.window import Windowfrom kivy.core.text import LabelBasefrom kivy.lang import BuilderWindow.size = (310,580)Builder.load_file("login.kv")class MyApp(MDApp):    def build(self):        screen_manager = ScreenManager()        screen_manager.add_widget(Builder.load_file('main.kv'))        return screen_managerMyApp().run()

How should I fix this issue?


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