diff --git a/src/Entity/Attachments/Attachment.php b/src/Entity/Attachments/Attachment.php
index 72075c42..d98cb847 100644
--- a/src/Entity/Attachments/Attachment.php
+++ b/src/Entity/Attachments/Attachment.php
@@ -77,7 +77,7 @@ use LogicException;
         new Delete(security: 'is_granted("delete", object)'),
     ],
     normalizationContext: ['groups' => ['attachment:read', 'attachment:read:standalone',  'api:basic:read'], 'openapi_definition_name' => 'Read'],
-    denormalizationContext: ['groups' => ['attachment:write', 'api:basic:write'], 'openapi_definition_name' => 'Write'],
+    denormalizationContext: ['groups' => ['attachment:write', 'attachment:write:standalone', 'api:basic:write'], 'openapi_definition_name' => 'Write'],
 )]
 #[DocumentedAPIProperty(schemaName: 'Attachment-Read', property: 'media_url', type: 'string', nullable: true,
     description: 'The URL to the file, where the attachment file can be downloaded. This can be an internal or external URL.',
@@ -142,7 +142,7 @@ abstract class Attachment extends AbstractNamedDBElement
      * ORM mapping is done in subclasses (like PartAttachment).
      * @phpstan-param T|null $element
      */
-    #[Groups(['attachment:read:standalone', 'attachment:write'])]
+    #[Groups(['attachment:read:standalone', 'attachment:write:standalone'])]
     protected ?AttachmentContainingDBElement $element = null;
 
     #[ORM\Column(type: Types::BOOLEAN)]
diff --git a/src/Entity/Parameters/AbstractParameter.php b/src/Entity/Parameters/AbstractParameter.php
index ebdbd777..3e090a73 100644
--- a/src/Entity/Parameters/AbstractParameter.php
+++ b/src/Entity/Parameters/AbstractParameter.php
@@ -87,7 +87,7 @@ use function sprintf;
         new Delete(security: 'is_granted("delete", object)'),
     ],
     normalizationContext: ['groups' => ['parameter:read', 'parameter:read:standalone',  'api:basic:read'], 'openapi_definition_name' => 'Read'],
-    denormalizationContext: ['groups' => ['parameter:write', 'api:basic:write'], 'openapi_definition_name' => 'Write'],
+    denormalizationContext: ['groups' => ['parameter:write', 'parameter:write:standalone', 'api:basic:write'], 'openapi_definition_name' => 'Write'],
 )]
 #[ApiFilter(LikeFilter::class, properties: ["name", "symbol", "unit", "group", "value_text"])]
 #[ApiFilter(DateFilter::class, strategy: DateFilter::EXCLUDE_NULL)]
@@ -161,7 +161,7 @@ abstract class AbstractParameter extends AbstractNamedDBElement
      *
      * @var AbstractDBElement|null the element to which this parameter belongs to
      */
-    #[Groups(['parameter:read:standalone', 'parameter:write'])]
+    #[Groups(['parameter:read:standalone', 'parameter:write:standalone'])]
     protected ?AbstractDBElement $element = null;
 
     public function __construct()