Dear Sir,
Download Content
or Use Content check and download option from learner login which is present at the bottom of screen(task bar of explorer) in Arrow Shape Green Color . you can use it for particular node downloading.
or
if not resolved then click on Content information icon. it will show you content location go to location (your content path\content\63\3002\362841\) and rename old files in that folder and then use content Check and Download option.