title: suddenly cant install apk on my android device
body: <p>I use to test and create apk (release / debug) and test it on my android device.
  I did delete the app before installing new versions.</p>
  <p>after awhile, when I uninstall it from the device and try to install new apk it gives me the error:</p>
  <pre><code>
  An existing package by the same name with a conflicting signature is already installed
  </code></pre>
  <p>I cant find the app on my android device and cant install any other version or something.</p>
  <p>Im still on testing stage and not publishing to store so I assume theres no need to change the version.</p>
  <p>any ideas??</p>