Is this a false positive Android:OpFake-FE [Trj]

I have had the app odd socks game by Oak Games developers installed on my phone for a few months now but when I went to open the app this morning my avast told me the app has a trojan and I should uninstall it. The information on screen was; Trojan detected Android:OpFake-FE [Trj] I’m not sure if this is a false positive or really a trojan. Please look into this and let me know. Thank you

http://forum.avast.com/index.php?topic=149134.msg1083455#msg1083455

Please use the search option on this webboard before posting.

Sorry eddy I did search before but as the app I was using wasn’t mention only the same trojan name. How as a none tech person do I know if the Android:OpFake-FE [Trj] coming up is an error on avast’s part or if sometimes this could really be a trojan. Maybe a bit more explanation about why this is a false positive would stop so many duplicate posts?