"You cannot install this app because another user has already installed an incompatible version on this device"
Refer this ,Actually your debug version of the app didnt get uninstalled properly
- Go to settings > apps > downloaded app list
- You can see the installed applications in the list(the application may not be in order. or may be towards the very end)
- Click on the application,go to the overflow menu option
- Click on uninstall for all users options
In my case I wasn't able to see the application in settings > apps > downloaded app list because I have already tried to uninstall it.
What worked for me was: adb shell pm uninstall com.packagename
I think my problem was because somehow I had installed the app on the Primary and Guest user and couldn't uninstall them from neither one.
In Redmi note3, the debug version of app was got installed on second space.
So Settings->Second space->Go to Second space. Uninstall the app.