diff --git a/face_recognition/constants.py b/face_recognition/constants.py
new file mode 100644
index 00000000..18821df3
--- /dev/null
+++ b/face_recognition/constants.py
@@ -0,0 +1 @@
+UNKNOWN_PEOPLE_NAME = '_Unknown_people'
diff --git a/face_recognition/face_recognition_manager.py b/face_recognition/face_recognition_manager.py
index 9745df13..3e55b34a 100644
--- a/face_recognition/face_recognition_manager.py
+++ b/face_recognition/face_recognition_manager.py
@@ -12,6 +12,7 @@
 from seafevents.repo_metadata.image_embedding_api import ImageEmbeddingAPI
 from seafevents.repo_metadata.utils import query_metadata_rows
 from seafevents.repo_metadata.constants import METADATA_TABLE, FACES_TABLE
+from seafevents.face_recognition.constants import UNKNOWN_PEOPLE_NAME
 from seafevents.face_recognition.utils import get_faces_rows, get_cluster_by_center, b64encode_embeddings, \
     b64decode_embeddings, VECTOR_DEFAULT_FLAG, get_min_cluster_size, SUPPORTED_IMAGE_FORMATS, EMBEDDING_UPDATE_LIMIT, \
     save_cluster_face
@@ -144,7 +145,9 @@ def face_cluster(self, repo_id):
 
             if label_id == -1:
                 if not unclustered_rows:
-                    label_id_to_added_cluster[label_id] = ({}, related_row_ids, None)
+                    label_id_to_added_cluster[label_id] = ({
+                        FACES_TABLE.columns.name.name: UNKNOWN_PEOPLE_NAME,
+                    }, related_row_ids, None)
                 else:
                     cluster_id = unclustered_rows[0][FACES_TABLE.columns.id.name]
                     label_id_to_updated_cluster[label_id] = ({}, related_row_ids, cluster_id, None)
diff --git a/face_recognition/utils.py b/face_recognition/utils.py
index 3b5ef87e..b58e2742 100644
--- a/face_recognition/utils.py
+++ b/face_recognition/utils.py
@@ -7,6 +7,7 @@
 
 from seafevents.repo_metadata.utils import query_metadata_rows, get_file_content
 from seafevents.repo_metadata.constants import FACES_TABLE, METADATA_TABLE
+from seafevents.face_recognition.constants import UNKNOWN_PEOPLE_NAME
 
 
 VECTOR_DEFAULT_FLAG = '0'
@@ -56,14 +57,14 @@ def get_cluster_by_center(center, clusters):
 def get_faces_rows(repo_id, metadata_server_api):
     sql = f'SELECT * FROM `{FACES_TABLE.name}`'
     query_result = query_metadata_rows(repo_id, metadata_server_api, sql)
-    culstered_rows = []
+    clustered_rows = []
     unclustered_rows = []
     for row in query_result:
-        if not row.get(FACES_TABLE.columns.vector.name):
+        if row.get(FACES_TABLE.columns.name.name) == UNKNOWN_PEOPLE_NAME:
             unclustered_rows.append(row)
         else:
-            culstered_rows.append(row)
-    return culstered_rows, unclustered_rows
+            clustered_rows.append(row)
+    return clustered_rows, unclustered_rows
 
 
 def get_face_embeddings(repo_id, image_embedding_api, obj_ids):