I updated my Nexus 5 to Android 4.4.4 a month ago. Now for the second time I've gotten a notification that a system update is available. When I check it, it's for the same build - Android 4.4.4 KTU84P. Not sure what to do. Can't get rid of the notification until I update it, right? Is it safe to install the same update twice? Sorry if this is in the wrong section.