diff --git a/invenio_communities/communities/schema.py b/invenio_communities/communities/schema.py
index 1db36a74a..5240042cb 100644
--- a/invenio_communities/communities/schema.py
+++ b/invenio_communities/communities/schema.py
@@ -76,6 +76,13 @@ def is_not_uuid(value):
         pass
 
 
+def is_not_reserved(value):
+    """Make sure value is not a reserved keyword."""
+    return validate.NoneOf(
+        iterable=["new"], error=("The ID cannot be a reserved keyword.")
+    )
+
+
 class CommunityAccessSchema(Schema):
     """Community Access Schema."""
 
@@ -233,6 +240,7 @@ class Meta:
                 ),
             ),
             is_not_uuid,
+            is_not_reserved,
         ],
     )
     metadata = NestedAttribute(CommunityMetadataSchema, required=True)