Unity 2017.2.0b9 ARCore build&run with Pixel XL (Android 8.0) Failed

why can`t i build in pixel xl(android8.0)?

and this is log:

 >     CommandInvokationFailure: Unable to install APK to device. Please make
 > sure the Android SDK is installed and
 > is properly configured in the Editor.
 > See the Console for more details. 
 >     /Users/allen/Library/Android/sdk/platform-tools/adb
 > -s "HT72K0201069" install -r "/Users/allen/Desktop/ARCore/test/ARCoreTest/apk.apk"
 >     
 >     stderr[
 >     Failed to install /Users/allen/Desktop/ARCore/test/ARCoreTest/apk.apk:
 > Failure
 > [INSTALL_FAILED_UPDATE_INCOMPATIBLE:
 > Package com.fevolution.ar signatures
 > do not match the previously installed
 > version; ignoring!]
 >     ]
 >     stdout[
 >     
 >     ]
 >     exit code: 1
 >     UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo
 > psi,
 > UnityEditor.Android.WaitingForProcessToExit
 > waitingForProcessToExit, System.String
 > errorMsg)
 >     UnityEditor.Android.ADB.RunInternal
 > (System.String[] command,
 > UnityEditor.Android.WaitingForProcessToExit
 > waitingForProcessToExit, System.String
 > errorMsg)
 >     UnityEditor.Android.ADB.Run (System.String[] command,
 > UnityEditor.Android.WaitingForProcessToExit
 > waitingForProcessToExit, System.String
 > errorMsg)
 >     UnityEditor.Android.AndroidDevice.Exec
 > (System.String[] command,
 > UnityEditor.Android.WaitingForProcessToExit
 > waitingForProcessToExit, System.String
 > errorMsg)
 >     UnityEditor.Android.AndroidDevice.Install
 > (System.String apkfile,
 > UnityEditor.Android.WaitingForProcessToExit
 > waitingForProcessToExit)
 >     UnityEditor.Android.AndroidDeploymentTargetsExtension+<UploadAPK>c__AnonStorey2.<>m__0
 > ()
 >     UnityEditor.Android.AndroidDeploymentTargetsExtension.UploadAPK
 > (UnityEditor.BuildReporting.BuildReport
 > buildReport,
 > UnityEditor.Android.AndroidDevice
 > device,
 > UnityEditor.ProgressTaskManager
 > taskManager)
 >     UnityEditor.Android.AndroidDeploymentTargetsExtension+<LaunchBuildOnTarget>c__AnonStorey1.<>m__0
 > ()
 >     UnityEditor.ProgressTaskManager.Run ()
 > (at
 > /Users/builduser/buildslave/unity/build/Editor/Mono/Utils/ProgressBarUtils.cs:71)
 >     UnityEditor.Android.AndroidDeploymentTargetsExtension.LaunchBuildOnTarget
 > (UnityEditor.BuildReporting.BuildReport
 > buildReport, DeploymentTargetId
 > targetId, UnityEditor.ProgressHandler
 > progressHandler)
 >     UnityEditor.DeploymentTargets.DeploymentTargetManager.LaunchBuildOnTarget
 > (BuildTargetGroup targetGroup,
 > UnityEditor.BuildReporting.BuildReport
 > buildReport, DeploymentTargetId
 > targetId, UnityEditor.ProgressHandler
 > progressHandler) (at
 > /Users/builduser/buildslave/unity/build/Editor/Mono/DeploymentTargets/DeploymentTargetManager.cs:36)
 >     UnityEditor.PostprocessBuildPlayer+<Launch>c__AnonStorey0.<>m__1
 > () (at
 > /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:181)
 >     UnityEditor.ProgressTaskManager.Run ()
 > (at
 > /Users/builduser/buildslave/unity/build/Editor/Mono/Utils/ProgressBarUtils.cs:71)
 >     UnityEditor.PostprocessBuildPlayer.Launch
 > (BuildTargetGroup targetGroup,
 > BuildTarget buildTarget, System.String
 > path, System.String productName,
 > BuildOptions options,
 > UnityEditor.BuildReporting.BuildReport
 > buildReport) (at
 > /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:197)
 >     UnityEngine.GUIUtility:ProcessEvent(Int32,
 > IntPtr)

and my setting:

and I also select Tango Supported option in XR Settings