tkinter Canvas Frameの枠線が消えない。

from tkinter import *
from tkinter import Tk
import pprint

class TkApp(Frame):
    def __init__(self, master=None):
        super().__init__(master)
        self.pack()
        self.master = master
        # self.master.resizable(width=0, height=0)

        self.window = []

        # main frame
        self.frame = Frame(self.master, bd=3)
        self.frame.pack()

        # left frame
        self.left_frame_container = Frame(self.frame)
        self.left_frame_container.pack(side='left')

        self.left_frame = LabelFrame(self.left_frame_container, text='Config')
        self.left_frame.pack(fill='both')
        self.data_entry_frame = LabelFrame(self.left_frame_container, text='Data to collect')
        self.data_entry_frame.pack(fil='both')

        self.user_frame = LabelFrame(self.left_frame, text='user')
        self.user_frame.grid(row=1, column=0, rowspan=2, columnspan=2, sticky='nsew', padx=20, pady=20)

        # right frame
        self.canvas = Canvas(self.frame, width=400, height=400, bd=0, highlightthickness=0)
        self.canvas.pack(side='left')
        scrollbar = Scrollbar(self.frame, orient=VERTICAL, command=self.canvas.yview)
        scrollbar.pack(side='right', fill='y', anchor='e')
        self.canvas["yscrollcommand"] = scrollbar.set
        self.canvas.yview_moveto(0)

        self.right_frame = LabelFrame(self.canvas, text='data')
        self.canvas.create_window((0, 0), window=self.right_frame, anchor=NW, width=self.canvas.cget('width'))

        self.padx = 10
        self.pady = 10
        self.create_widget()
        self.user()
        self.data_info()

        self.submit_data = []
        self.widget = []

    def create_widget(self):
        blank = Label(self.left_frame, text='blank')
        blank.grid(row=0, column=0, padx=self.padx, pady=self.pady)
        self.num_blank = Spinbox(self.left_frame, state='readonly', from_=0, to=100, increment=1)
        self.num_blank.grid(row=0, column=1, padx=self.padx, pady=self.pady)

    def user(self):
        self.user_maki = Checkbutton(self.user_frame, text='ma', width=8, height=3)
        self.user_maki.grid(row=0, column=0, padx=self.padx, pady=self.pady)
        self.user_tuki = Checkbutton(self.user_frame, text='tu', width=8, height=3)
        self.user_tuki.grid(row=0, column=1, padx=self.padx, pady=self.pady)
        self.user_zoe = Checkbutton(self.user_frame, text='zo', width=8, height=3)
        self.user_zoe.grid(row=0, column=2, padx=self.padx, pady=self.pady)

    def data_info(self):
        data_name_label = Label(self.data_entry_frame, text='data name')
        data_name_label.grid(row=0, column=0, padx=self.padx, pady=self.pady)
        self.data_name = Entry(self.data_entry_frame)
        self.data_name.grid(row=0, column=1)
        num_data_label = Label(self.data_entry_frame, text='num data')
        num_data_label.grid(row=1, column=0, padx=self.padx, pady=self.pady)
        self.num_data = Spinbox(self.data_entry_frame, state='readonly', from_=0, to=100, increment=1)
        self.num_data.grid(row=1, column=1, padx=self.padx, pady=self.pady)

        # submit btn
        btn = Button(self.data_entry_frame, command=self.click_btn, text='OK', width=10, height=2)
        btn.grid(row=2, column=0, columnspan=2, padx=self.padx, pady=self.pady)

    def click_btn(self):
        frame = Frame(self.right_frame, width=20, height=10, highlightthickness=0)
        frame.pack(side='top', pady=10)

        data_name = Label(frame, text=self.data_name.get(), width=10)
        data_name.pack(side='left', fill='both')
        num_data = Label(frame, text=self.num_data.get(), width=5)
        num_data.pack(side='left')

        # -------------------ここです！
        del_btn = Button(frame, text='delete', command=lambda: [w.destroy() for w in frame.winfo_children()] and self.add_test(frame), width=5, height=1)
        # -------------------
        del_btn.pack(side='right')

        #  scroll 調整
        print(self.right_frame.winfo_children())
        self.canvas.config(scrollregion=(0, 0, 0, len(self.right_frame.winfo_children())*50))



    def get_data(self):
        for w in self.widget:
            c = w.winfo_children()
            for cc in c:
                print(cc.cget('text'))
    
    def add_test(self, frame):
        frame.destroy()

        if len(self.right_frame.winfo_children()) == 0:
            self.right_frame.destroy()
            self.right_frame = LabelFrame(self.canvas, text='data')
            self.canvas.create_window((0, 0), window=self.right_frame, anchor=NW, width=self.canvas.cget('width'))

root = Tk()
app = TkApp(master=root)
app.mainloop()