Android Question Error uploading .apk to Google Play "b4a.example already exists"

IDE menu > Project > Build Configuration > Package Name. Should be something unique .. ie com.swabygw.myappname

Thanks, I changed it as directed which, although, it solved the problem of being able to upload it to Google Play, when I recompile/run in any mode (Release, Debug, etc.), I'm getting a new error that access to the path of the .apk file is denied (I'm using B4A v5.50 and have the project stored in a Documents subdirectory). I tried right-clicking on the .apk file and reclaiming ownership of the file, but it seems that permission is denied to do that. Looks like it won't let me delete the file, either.

UPDATE: Rebooting my machine seems to have solved the problem - after reboot, the .apk file was gone and I could recompile. Thanks for your help!

I can only suggest restarting your pc / laptop .. if you have not already done so.
is your Documents folder located in a Google Drive folder ?

No - I tried copying my project to another folder (without the .apk file) and the worked for one compile and, then, the newly-created .apk was locked again. Rebooting removed the file again. Something about changing Package Name did it. It's odd...but, rebooting gets it done.