Add different setUser call.

app/Repositories/ObjectGroup/ObjectGroupRepository.php

@@ -28,6 +28,7 @@ use DB;
 use FireflyIII\Models\ObjectGroup;
 use FireflyIII\Models\PiggyBank;
 use FireflyIII\User;
+use Illuminate\Contracts\Auth\Authenticatable;
 use Illuminate\Support\Collection;
 use Log;
 
@@ -151,11 +152,13 @@ class ObjectGroupRepository implements ObjectGroupRepositoryInterface
     }
 
     /**
-     * @param  User  $user
+     * @param  User|Authenticatable|null  $user
      */
-    public function setUser(User $user): void
+    public function setUser(User|Authenticatable|null $user): void
     {
-        $this->user = $user;
+        if (null !== $user) {
+            $this->user = $user;
+        }
     }
 
     /**