diff --git a/onyxia-api/src/main/java/fr/insee/onyxia/api/services/impl/kubernetes/KubernetesService.java b/onyxia-api/src/main/java/fr/insee/onyxia/api/services/impl/kubernetes/KubernetesService.java
index c53f09b6..16e43623 100644
--- a/onyxia-api/src/main/java/fr/insee/onyxia/api/services/impl/kubernetes/KubernetesService.java
+++ b/onyxia-api/src/main/java/fr/insee/onyxia/api/services/impl/kubernetes/KubernetesService.java
@@ -169,12 +169,11 @@ private String createNamespace(Region region, String namespaceId, Owner owner) {
 
     private boolean isNamespaceAlreadyExisting(Region region, String namespaceId) {
         return kubernetesClientProvider
-                .getRootClient(region)
-                .namespaces()
-                .list()
-                .getItems()
-                .stream()
-                .anyMatch(ns -> ns.getMetadata().getName().equals(namespaceId));
+                        .getRootClient(region)
+                        .namespaces()
+                        .withName(namespaceId)
+                        .get()
+                != null;
     }
 
     private void applyQuotas(