mobile

I have a VZ LG G3 that I rooted using StumpRoot. I am trying to do the Verizon system update to Lollipop. It downloads it and then it reboots, but almost immediately it shows me error 0x1117008, and then just reboots again and tells me the update failed. It doesnt give me any other info. Currently my phone shows Android version 4.4.2 and software version VS98511C and shows the Software status as Modified. Is there a way to get Lollipop? Would I have to unroot first? (If so, what is the best way? SuperSU offers me that option). I appreciate any help. Thanks.