java.io.IOException: MAIN_THREAD

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java.io.IOException: MAIN_THREAD
at com.google.firebase.iid.zzd.zzb(Unknown Source)
at com.google.firebase.iid.FirebaseInstanceId.deleteInstanceId(Unknown Source)
at jp.seesaa.itmama.push.PushUtil.setPushSetting(PushUtil.java:32)
at jp.seesaa.itmama.ui.main.setting.SettingFragment.onSharedPreferenceChanged(SettingFragment.java:66)
at android.app.SharedPreferencesImpl$EditorImpl.notifyListeners(SharedPreferencesImpl.java:476)
at android.app.SharedPreferencesImpl$EditorImpl.apply(SharedPreferencesImpl.java:384)
at android.support.v4.content.EditorCompatGingerbread.apply(EditorCompatGingerbread.java:25)
at android.support.v4.content.SharedPreferencesCompat$EditorCompat$EditorHelperApi9Impl.apply(SharedPreferencesCompat.java:45)
at android.support.v7.preference.Preference.tryCommit(Preference.java:1353)
at android.support.v7.preference.Preference.persistBoolean(Preference.java:1558)
at android.support.v7.preference.TwoStatePreference.setChecked(TwoStatePreference.java:79)
at android.support.v7.preference.TwoStatePreference.onClick(TwoStatePreference.java:64)
at android.support.v7.preference.Preference.performClick(Preference.java:971)
at android.support.v7.preference.Preference.performClick(Preference.java:957)
at android.support.v7.preference.SwitchPreferenceCompat.performClick(SwitchPreferenceCompat.java:203)
at android.support.v7.preference.Preference$1.onClick(Preference.java:145)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)

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