[BUG] extension overwrite not work when use command: rearrange linked attachment

[muzhi1991]

Thank you for your plugin, it works very well,.
there is a small bug, that is, "extension overwrite" only works when you paste the file, it doesn't work when I use the command: rearrange linked attachment, (exactly) It doesn't work, it only renames the file name, it doesn't move the installation to the overwrite directory, I suspect it's a problem introduced by the ${originalname} variable, if it's set, renaming won't work).