fix: can create inversed one to one with non nullable

src/Persistence/PersistentObjectFactory.php

@@ -22,6 +22,8 @@
 use Zenstruck\Foundry\Persistence\Exception\NotEnoughObjects;
 use Zenstruck\Foundry\Persistence\Exception\RefreshObjectFailed;
 
+use function Zenstruck\Foundry\get;
+
 /**
  * @author Kevin Bond <[email protected]>
  *
@@ -271,13 +273,20 @@ protected function normalizeParameter(string $field, mixed $value): mixed
 
             // handle inversed OneToOne
             if ($relationshipMetadata && !$relationshipMetadata->isCollection && $inverseField = $relationshipMetadata->inverseField) {
-                $this->tempAfterPersist[] = static function(object $object) use ($value, $inverseField, $pm) {
+                $inversedObject = unproxy($value->create());
+                $this->tempAfterPersist[] = static function(object $object) use ($value, $inverseField, $pm, $inversedObject, $field) {
                     $value->create([$inverseField => $object]);
                     $pm->refresh($object);
+                    $oldObj = get($inversedObject, $inverseField);
+                    delete($inversedObject);
+                    if ($oldObj) {
+                        delete($oldObj);
+                    }
                 };
 
-                // creation delegated to afterPersist hook - return empty array here
-                return null;
+                // let's already add the current inversedObject,
+                // but we'll need to remove all its potential "owning side entity" afterward (see the after persist closure)
+                return $inversedObject;
             }
 
             if (Configuration::instance()->persistence()->relationshipMetadata(static::class(), $value::class(), $field)?->isCascadePersist) {