“app not installed” when trying to uninstall app after it's installed via Android Studio -

i have meizu m2, (android version 5.1, , flyme version 4.5.31) , run app on phone, (with "run" button, not export apk file -> install via file manager) , app works fine, when i'm trying uninstall app, it's problems.

after uninstalled app, (settings -> apps -> "test1" (app name) -> uninstall) not exists anymore on phone, in apps list, (in settings) app still exists, label "not installed" - image

(the app "test1")

how can remove app? (the app basic app examples templates, nothing special) , pc os linux fedora 22 (if matter)

thanks in advance.

update when i'm trying install apk via file manager, (on phone), after did build -> generate signed apk`, error - image (the "app not installed" message appears after click "install")

and may helpfull: found websites, try adb (to delete file (which need root access, (i think) need adb)) don't know how use adb @ all.. (i don't know how connect phone)

1. on phone, enable developer options (look how this)
2. enable usb debugging developer options
3. connect phone pc usb cable
4. on pc type "adb uninstall [package name]"

the package name com.company.appname.