iTunes wants to update iPhone, though it's up to date
Hello, I have an iPhone 6 Plus (9.2.1) and a MacBook Pro (10.11.3). When I plug my iPhone into my MacBook and open iTunes it claims that the iOS needs to be updated. However, on the iPhone itself in settings it claims that it is up to date. When 9.2.1 was released I went to settings on the iPhone and updated it. Does anyone know a solution to this? Thanks!
iPhone 6 Plus, iOS 9.2.1, 16Gb