diff --git a/core/src/main/java/io/kestra/core/services/KVStoreService.java b/core/src/main/java/io/kestra/core/services/KVStoreService.java
index 467bff458f5..7b301a00249 100644
--- a/core/src/main/java/io/kestra/core/services/KVStoreService.java
+++ b/core/src/main/java/io/kestra/core/services/KVStoreService.java
@@ -8,6 +8,8 @@
 import jakarta.inject.Inject;
 import jakarta.inject.Singleton;
 
+import java.io.IOException;
+
 @Singleton
 public class KVStoreService {
 
@@ -29,19 +31,7 @@ public class KVStoreService {
      * @return The {@link KVStore}.
      */
     public KVStore get(String tenant, String namespace, @Nullable String fromNamespace) {
-
-        // Only check namespace existence if not a descendant
-        boolean checkIfNamespaceExists = fromNamespace == null || isNotParentNamespace(namespace, fromNamespace);
-
-        if (checkIfNamespaceExists && !namespaceService.isNamespaceExists(tenant, namespace)) {
-            throw new KVStoreException(String.format(
-                "Cannot access the KV store. The namespace '%s' does not exist.",
-                namespace
-            ));
-        }
-
         boolean isNotSameNamespace = fromNamespace != null && !namespace.equals(fromNamespace);
-
         if (isNotSameNamespace && isNotParentNamespace(namespace, fromNamespace)) {
             try {
                 flowService.checkAllowedNamespace(tenant, namespace, tenant, fromNamespace);
@@ -52,6 +42,24 @@ public KVStore get(String tenant, String namespace, @Nullable String fromNamespa
             }
         }
 
+        // Only check namespace existence if not a descendant
+        boolean checkIfNamespaceExists = fromNamespace == null || isNotParentNamespace(namespace, fromNamespace);
+        if (checkIfNamespaceExists && !namespaceService.isNamespaceExists(tenant, namespace)) {
+            // if it didn't exist, we still check if there are KV as you can add KV without creating a namespace in DB or having flows in it
+            KVStore kvStore = new InternalKVStore(tenant, namespace, storageInterface);
+            try {
+                if (kvStore.list().isEmpty()) {
+                    throw new KVStoreException(String.format(
+                        "Cannot access the KV store. The namespace '%s' does not exist.",
+                        namespace
+                    ));
+                }
+            } catch (IOException e) {
+                throw new KVStoreException(e);
+            }
+            return kvStore;
+        }
+
         return new InternalKVStore(tenant, namespace, storageInterface);
     }
 
diff --git a/core/src/test/java/io/kestra/core/services/KVStoreServiceTest.java b/core/src/test/java/io/kestra/core/services/KVStoreServiceTest.java
index bb4c732b1b2..e3ad5d2e8b5 100644
--- a/core/src/test/java/io/kestra/core/services/KVStoreServiceTest.java
+++ b/core/src/test/java/io/kestra/core/services/KVStoreServiceTest.java
@@ -2,12 +2,15 @@
 
 import io.kestra.core.junit.annotations.KestraTest;
 import io.kestra.core.repositories.FlowRepositoryInterface;
-import io.kestra.core.storages.kv.KVStoreException;
+import io.kestra.core.storages.StorageInterface;
+import io.kestra.core.storages.kv.*;
 import io.micronaut.test.annotation.MockBean;
 import jakarta.inject.Inject;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
+import java.io.IOException;
+import java.time.Duration;
 import java.util.Optional;
 
 @KestraTest
@@ -19,7 +22,7 @@ class KVStoreServiceTest {
     KVStoreService storeService;
 
     @Inject
-    FlowRepositoryInterface flowRepository;
+    StorageInterface storageInterface;
 
     @Test
     void shouldGetKVStoreForExistingNamespaceGivenFromNull() {
@@ -37,6 +40,13 @@ void shouldGetKVStoreForAnyNamespaceWhenAccessingFromChildNamespace() {
         Assertions.assertNotNull(storeService.get(null, "io.kestra", TEST_EXISTING_NAMESPACE));
     }
 
+    @Test
+    void shouldGetKVStoreFromNonExistingNamespaceWithAKV() throws IOException {
+        KVStore kvStore = new InternalKVStore(null, "system", storageInterface);
+        kvStore.put("key", new KVValueAndMetadata(new KVMetadata(Duration.ofHours(1)), "value"));
+        Assertions.assertNotNull(storeService.get(null, "system", null));
+    }
+
     @MockBean(NamespaceService.class)
     public static class MockNamespaceService extends NamespaceService {
 
diff --git a/core/src/test/java/io/kestra/plugin/core/kv/SetTest.java b/core/src/test/java/io/kestra/plugin/core/kv/SetTest.java
index 36e79846610..dea7b03220b 100644
--- a/core/src/test/java/io/kestra/plugin/core/kv/SetTest.java
+++ b/core/src/test/java/io/kestra/plugin/core/kv/SetTest.java
@@ -130,7 +130,7 @@ void shouldFailGivenNonExistingNamespace() {
             .type(Set.class.getName())
             .key("{{ inputs.key }}")
             .value("{{ inputs.value }}")
-            .namespace("???")
+            .namespace("not-found")
             .build();
 
         // When - Then