Python symlink FileExistsError

Question

I want to read out one folder and create symlinks of this folder in an other folder, but I get an FileExistsError: [WinError 183] file can not be created if it allready exists: 'C:\Users\Dag\Desktop\aaa\0_Data\abc' -> 'C:\Users\Dag\Desktop\aaa\3_Docs\docs'

import os
import tkinter as tk
from tkinter import filedialog

root = tk.Tk()
root.withdraw()


rootDir = filedialog.askdirectory(parent=root, initialdir="/",
                                  title='Select a root directory')
destDir = filedialog.askdirectory(parent=root, initialdir="/",
                                  title='Select a destination directory') 
subfolder = ''
subfolderRoot = []
i = 0
for item in os.listdir(os.path.normpath(destDir + "/")):
    subfolder = item
    i = i + 1
    print(subfolder)
    print(i)

    for item in os.listdir(os.path.normpath(rootDir + "/")):
        if os.path.isdir(os.path.join(rootDir, item)):
            source = os.path.normpath(rootDir + "/" + item)
            link_name = os.path.normpath(destDir + '/' + subfolder + '/')
            os.symlink(source, link_name)

            print("dest: " + link_name)
            print("source: " + source)


print(subfolder)

console print

What do I wrong here?