Do not cascade remove from resource node to resource format

Part 2

src/CoreBundle/Entity/ResourceFormat.php

@@ -30,7 +30,7 @@ class ResourceFormat
     /**
      * @var Collection<int, ResourceNode>
      */
-    #[ORM\OneToMany(targetEntity: ResourceNode::class, mappedBy: 'resourceFormat', cascade: ['persist', 'remove'])]
+    #[ORM\OneToMany(mappedBy: 'resourceFormat', targetEntity: ResourceNode::class)]
     protected Collection $resourceNodes;
 
     public function __construct()

src/CoreBundle/Entity/ResourceNode.php

@@ -100,9 +100,9 @@ class ResourceNode implements Stringable
     #[Gedmo\SortableGroup]
     protected ResourceType $resourceType;
 
-    #[ORM\ManyToOne(targetEntity: ResourceFormat::class, cascade: ['persist'], inversedBy: 'resourceNodes')]
+    #[ORM\ManyToOne(targetEntity: ResourceFormat::class, inversedBy: 'resourceNodes')]
     #[ORM\JoinColumn(name: 'resource_format_id', referencedColumnName: 'id')]
-    protected ResourceFormat $resourceFormat;
+    protected ?ResourceFormat $resourceFormat = null;
 
     /**
      * @var Collection<int, ResourceLink>
@@ -388,7 +388,7 @@ class ResourceNode implements Stringable
         return $this->resourceFormat;
     }
 
-    public function setResourceFormat(ResourceFormat $resourceFormat): self
+    public function setResourceFormat(?ResourceFormat $resourceFormat): self
     {
         $this->resourceFormat = $resourceFormat;