diff --git a/services/core/java/com/android/server/pm/PackageManagerShellCommand.java b/services/core/java/com/android/server/pm/PackageManagerShellCommand.java
index 52a7c6ef4b714..f1c84b8701ba6 100644
--- a/services/core/java/com/android/server/pm/PackageManagerShellCommand.java
+++ b/services/core/java/com/android/server/pm/PackageManagerShellCommand.java
@@ -2437,10 +2437,14 @@ class PackageManagerShellCommand extends ShellCommand {
             }
         }
         String arg = getNextArg();
-        if (arg == null) {
+        if (arg == null && !preCreateOnly) {
             getErrPrintWriter().println("Error: no user name specified.");
             return 1;
         }
+        if (arg != null && preCreateOnly) {
+            getErrPrintWriter().println("Warning: name is ignored for pre-created users");
+        }
+
         name = arg;
         UserInfo info;
         IUserManager um = IUserManager.Stub.asInterface(
diff --git a/services/core/java/com/android/server/pm/UserManagerService.java b/services/core/java/com/android/server/pm/UserManagerService.java
index 95baa01923f5a..22eb1b497cf42 100644
--- a/services/core/java/com/android/server/pm/UserManagerService.java
+++ b/services/core/java/com/android/server/pm/UserManagerService.java
@@ -2846,7 +2846,7 @@ public class UserManagerService extends IUserManager.Stub {
                     return null;
                 }
                 // If we're adding a guest and there already exists one, bail.
-                if (isGuest && findCurrentGuestUser() != null) {
+                if (isGuest && !preCreate && findCurrentGuestUser() != null) {
                     Log.e(LOG_TAG, "Cannot add guest user. Guest user already exists.");
                     return null;
                 }
@@ -3100,7 +3100,8 @@ public class UserManagerService extends IUserManager.Stub {
             final int size = mUsers.size();
             for (int i = 0; i < size; i++) {
                 final UserInfo user = mUsers.valueAt(i).info;
-                if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) {
+                if (user.isGuest() && !user.guestToRemove && !user.preCreated
+                        && !mRemovingUserIds.get(user.id)) {
                     return user;
                 }
             }