diff --git a/deevirt_schema/libvirt/dom/config.py b/deevirt_schema/libvirt/dom/config.py
index d7c594e..54db4ae 100644
--- a/deevirt_schema/libvirt/dom/config.py
+++ b/deevirt_schema/libvirt/dom/config.py
@@ -20,12 +20,15 @@ class UnitEnum(str, Enum):
     GiB = "GiB"
     TiB = "TiB"
 
-class MetadataDeevirt(BaseXmlModel, ns="deevirt", nsmap={'deevirt': 'https://deevirt.fr/schema/1.0'}):
+class MetadataDeevirt(BaseXmlModel, tag="instance"):
     company_id:UUID4 = element()
     datacenter_id:UUID4 = element()
 
+class MetadataDeevirtNS(MetadataDeevirt, ns="deevirt", nsmap={'deevirt': 'https://deevirt.fr/schema/1.0'}):
+    pass
+
 class Metadata(BaseXmlModel):
-    instance:Optional[MetadataDeevirt] = element(default=None, ns="deevirt", nsmap={'deevirt': 'https://deevirt.fr/schema/1.0'})
+    instance:Optional[MetadataDeevirtNS] = element(default=None, ns="deevirt", nsmap={'deevirt': 'https://deevirt.fr/schema/1.0'})
 
 class OSType(BaseXmlModel, search_mode='ordered'):
     class archEnum(str, Enum):