diff --git a/server/pkg/api/rest/docs/docs.go b/server/pkg/api/rest/docs/docs.go
index 008fbaa..ad66e75 100644
--- a/server/pkg/api/rest/docs/docs.go
+++ b/server/pkg/api/rest/docs/docs.go
@@ -1809,6 +1809,7 @@ const docTemplate = `{
             "type": "object",
             "required": [
                 "id",
+                "label",
                 "resourceType"
             ],
             "properties": {
@@ -1817,6 +1818,9 @@ const docTemplate = `{
                 },
                 "label": {
                     "type": "object",
+                    "required": [
+                        "sys.namespace"
+                    ],
                     "properties": {
                         "sys.namespace": {
                             "type": "string"
diff --git a/server/pkg/api/rest/docs/swagger.json b/server/pkg/api/rest/docs/swagger.json
index 3ce42ac..0ffbb80 100644
--- a/server/pkg/api/rest/docs/swagger.json
+++ b/server/pkg/api/rest/docs/swagger.json
@@ -1802,6 +1802,7 @@
             "type": "object",
             "required": [
                 "id",
+                "label",
                 "resourceType"
             ],
             "properties": {
@@ -1810,6 +1811,9 @@
                 },
                 "label": {
                     "type": "object",
+                    "required": [
+                        "sys.namespace"
+                    ],
                     "properties": {
                         "sys.namespace": {
                             "type": "string"
diff --git a/server/pkg/api/rest/docs/swagger.yaml b/server/pkg/api/rest/docs/swagger.yaml
index a852ee4..6f1b3ec 100644
--- a/server/pkg/api/rest/docs/swagger.yaml
+++ b/server/pkg/api/rest/docs/swagger.yaml
@@ -155,11 +155,14 @@ definitions:
         properties:
           sys.namespace:
             type: string
+        required:
+        - sys.namespace
         type: object
       resourceType:
         type: string
     required:
     - id
+    - label
     - resourceType
     type: object
   github_com_cloud-barista_cm-honeybee_server_pkg_api_rest_model.SavedBenchmarkInfo:
diff --git a/server/pkg/api/rest/model/sourceGroup.go b/server/pkg/api/rest/model/sourceGroup.go
index 54749a5..3e64fbb 100644
--- a/server/pkg/api/rest/model/sourceGroup.go
+++ b/server/pkg/api/rest/model/sourceGroup.go
@@ -15,8 +15,8 @@ type RegisterTargetInfoReq struct {
 	ResourceType string `json:"resourceType" validate:"required"`
 	ID           string `json:"id" validate:"required"`
 	Label        struct {
-		SysNamespace string `json:"sys.namespace"`
-	} `json:"label"`
+		SysNamespace string `json:"sys.namespace" validate:"required"`
+	} `json:"label" validate:"required"`
 }
 
 type SourceGroup struct {