diff --git a/src/config/api-server/vnc_cfg_api_server.py b/src/config/api-server/vnc_cfg_api_server.py
index bf265f883cf..0d1528da8c7 100644
--- a/src/config/api-server/vnc_cfg_api_server.py
+++ b/src/config/api-server/vnc_cfg_api_server.py
@@ -203,6 +203,8 @@ def _validate_complex_type(cls, dict_cls, dict_body):
             attr_type = attr_type_vals['attr_type']
             restrictions = attr_type_vals['restrictions']
             is_array = attr_type_vals.get('is_array', False)
+            if value is None:
+                continue
             if is_array:
                 if not isinstance(value, list):
                     raise ValueError('Field %s must be a list. Received value: %s'