Facing an Internal Error Suddenly

Hi,
I am facing an internal error while debugging my app today. It was fine till yesterday. The error I am getting -

Xamarin.AndroidTools.AndroidDeploymentException: InternalError ---> Mono.AndroidTools.InstallFailedException: Failure [INSTALL_FAILED_UPDATE_INCOMPATIBLE]
at Mono.AndroidTools.Internal.AdbOutputParsing.CheckInstallSuccess(String output, String packageName)
at Mono.AndroidTools.AndroidDevice.<>c__DisplayClass2c.b__2b(Task

1 t)
   at System.Threading.Tasks.ContinuationTaskFromResultTask

1.InnerInvoke()

at System.Threading.Tasks.Task.Execute()
--- End of inner exception stack trace ---
at Xamarin.AndroidTools.AndroidDeploySession.RunLogged(CancellationToken token)
at Xamarin.AndroidTools.AndroidDeploySession.Start(CancellationToken token)

Can anyone plz help.