I have a late 2016 13" MBP with the touch bar. I set up time machine for the first time today, since I got the machine last week. I had to interrupt time machine because something came up and I had to go somewhere. So I just unplugged the external hard drive figuring that I would just plug it back it and redo time machine. So when I reconnected the external hard drive and started the time machine I got these tiled windows. It won't continue the time machine when I left off. It acts like I have a legit time machine backup. I just want to redo time machine and it won't let me. How do I restart a new time machine?