您已经调试副本还是安装在最有可能的设备上。现在您已经下载了相同的应用程序的不同副本，它是造成此错误。

You have your debug copy still installed on your device most likely. Now you have downloaded a different copy of the same app and it's causing this error.

完全从设备卸载该应用程序。然后从市场上重新下载它，它应该工作。

Uninstall the app completely from your device. Then download it from the market again and it should work.