I have this frequently with the MutzNutz files, the holding file rename that to a, if there is any sub folders then rename them to b c x y anything as long as it isn't a repeat and then you can move the long file if you still can't move the long file rename that file BUT you can only rename a long file 'if' you have already renamed the holding folder.
same thing if you choose to just delete the file as you get an error saying too long file name cannot be deleted etc etc