dos下用move命令移动文件夹

要将d:\TestLog下除了当日的文件夹移动到d:\backup
脚本如下

@echo off
mode con lines=30 cols=60
%1 mshta vbscript:CreateObject("Shell.Application").ShellExecute("cmd.exe","/c %~s0 ::","","runas",1)(window.close)&&exit
cd /d "%~dp0"

set logRoot=d:\TestLog
set D=%date:~0,4%%date:~5,2%%date:~8,2%

d:
cd \
md backup
cd TestLog 

for /f "" %%a in ('dir /b') do (
 for %%I in (AT,CAT) do (
  if exist %logRoot%\%%a\%%I (
   for /d %%c  in (%logRoot%\%%a\%%I\*) do ( 
     echo %%c
     if "%%c" == "%logRoot%\%%a\%%I\%D%" (echo file not loading) else (move %%c d:\backup\ )
) 
)
)
)

出现错误：

错误原因：目标文件夹已存在同名的要移动的文件夹