1 files changed, 6 insertions, 2 deletions
diff --git a/java/src/com/android/inputmethod/latin/settings/Settings.java b/java/src/com/android/inputmethod/latin/settings/Settings.java
index 9bd2b9389..64f53b525 100644
--- a/java/src/com/android/inputmethod/latin/settings/Settings.java
+++ b/java/src/com/android/inputmethod/latin/settings/Settings.java
@@ -371,8 +371,12 @@ public final class Settings implements SharedPreferences.OnSharedPreferenceChang
     }
 
     public void writeLastUsedPersonalizationToken(byte[] token) {
-        final String tokenStr = StringUtils.byteArrayToHexString(token);
-        mPrefs.edit().putString(PREF_LAST_USED_PERSONALIZATION_TOKEN, tokenStr).apply();
+        if (token == null) {
+            mPrefs.edit().remove(PREF_LAST_USED_PERSONALIZATION_TOKEN).apply();
+        } else {
+            final String tokenStr = StringUtils.byteArrayToHexString(token);
+            mPrefs.edit().putString(PREF_LAST_USED_PERSONALIZATION_TOKEN, tokenStr).apply();
+        }
     }
 
     public byte[] readLastUsedPersonalizationToken() {