Overwrite existing file

I working on a script that copies a file to a new folder and then takes that file and movers it to a “History” folder. It works great until it encounters a file with the same name, I was trying to get it to overwrite it, but I would love it to prompt me if I would like to overwrite that file on the copy file and just replace on the move file. Thanks


on open files_rename
	
	set copy_folder to choose folder name with prompt "Select Folder to Copy Files to"
	set move_folder to "Retouching:6.img_history:"
	
	tell application "Finder"
		repeat with aFile in files_rename
			
			duplicate aFile to copy_folder with replacing
			move aFile to move_folder with replacing
			
		end repeat
	end tell
end open

Hi,

just omit with replacing in the duplicate line