File Manager Cant Move Folder If Directory already Exisits

so on my Pool Drive i trying to move a folder into an existing same name folder but it will not let me.. you can COPY but you can not MOVE

example

\Main\Test123 <=== if i have files in the directory

\Main\New\Test123 <== if i have a folder here with files or if its blank

now if i try to do MOVE

\Main\Test123 to \Main\New\ it does nothing the check box un highlights and does nothing.. but COPY works but Move just cancels out