diff --git a/UPGRADE.md b/UPGRADE.md
index d3ae59bd..b9ff4109 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -139,20 +139,20 @@ If you prefer to use the new structure, you may create a migration to apply the
 
 ```php
 Schema::table('oauth_clients', function (Blueprint $table) {
-    $table->after('user_id', function (Blueprint $table) {
-        $table->nullableMorphs('owner');
-    });
+    $table->nullableMorphs('owner', after: 'user_id');
 
     $table->after('provider', function (Blueprint $table) {
         $table->text('redirect_uris');
-        $table->text('grant_types');
+        $table->text('grant_types')->nullable();
     });
 });
 
 foreach (Passport::client()->cursor() as $client) {
     Model::withoutTimestamps(fn () => $client->forceFill([
         'owner_id' => $client->user_id,
-        'owner_type' => $client->user_id ? config('auth.providers.'.$client->provider.'.model') : null,
+        'owner_type' => $client->user_id
+            ? config('auth.providers.'.($client->provider ?: config('auth.guards.api.provider')).'.model')
+            : null,
         'redirect_uris' => $client->redirect_uris,
         'grant_types' => $client->grant_types,
     ])->save());