I have a nexus-5 with Android Kitkat 4.4.4, no root or anything like that. I tried to install the game "The Walking Dead: Season Two" but after the download I got this error: incompatible with other application(s) using the same shared user ID. I don't know how to fix it.
Note: It's important for me to say that I don't understand about ROM, ROOT and how the Android OS works. So please; if you post an answer, write as many details as you can. I very much appreciate the help!
The error Message: