diff --git a/neutron/Chart.yaml b/neutron/Chart.yaml
index 37c277547a..158110be2a 100644
--- a/neutron/Chart.yaml
+++ b/neutron/Chart.yaml
@@ -14,7 +14,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Neutron
 name: neutron
-version: 0.2.20
+version: 0.2.21
 home: https://docs.openstack.org/neutron/latest/
 icon: https://www.openstack.org/themes/openstack/images/project-mascots/Neutron/OpenStack_Project_Neutron_vertical.png
 sources:
diff --git a/neutron/templates/bin/_neutron-netns-cleanup-cron.py.tpl b/neutron/templates/bin/_neutron-netns-cleanup-cron.py.tpl
old mode 100644
new mode 100755
index 273041ac0a..f4913edc88
--- a/neutron/templates/bin/_neutron-netns-cleanup-cron.py.tpl
+++ b/neutron/templates/bin/_neutron-netns-cleanup-cron.py.tpl
@@ -6,12 +6,13 @@ import time
 import socket
 from neutron.common import config
 from oslo_config import cfg
+from oslo_concurrency import processutils
 from neutron.agent.linux import dhcp
 from neutron.agent.l3 import namespaces
 from neutron.agent.l3 import dvr_snat_ns
 from neutron.agent.l3 import dvr_fip_ns
 from neutron.cmd.netns_cleanup import setup_conf
-from neutron.cmd.netns_cleanup import destroy_namespace
+from neutron.cmd.netns_cleanup import unplug_device
 from neutron.cmd.netns_cleanup import eligible_for_deletion
 from neutron.conf.agent import common as agent_config
 from neutron.agent.linux import ip_lib
@@ -31,10 +32,24 @@ def get_neutron_creds():
         'username': os.getenv('OS_USERNAME', 'admin'),
         'cafile' : os.getenv('OS_CACERT','/var/lib/neutron/openstack-helm/openstack-helm.crt'),
         'insecure' : os.getenv('NEUTRON_CLEANUP_INSECURE', 'true'),
-        'debug': os.getenv('NEUTRON_CLEANUP_DEBUG', 'false'),
-        'wait': os.getenv('NEUTRON_CLEANUP_TIMEOUT', '1800')}
+        'debug': os.getenv('NEUTRON_CLEANUP_DEBUG', 'true'),
+        'wait': os.getenv('NEUTRON_CLEANUP_TIMEOUT', '600')}
     return opts
 
+def ldestroy_namespace(conf, namespace):
+    try:
+        ip = ip_lib.IPWrapper(namespace=namespace)
+        if ip.netns.exists(namespace):
+            cmd = ['ip', 'netns', 'pids', namespace]
+            output = processutils.execute(*cmd, run_as_root=True, root_helper=conf.AGENT.root_helper)
+            for pid in output[0].splitlines():
+                utils.kill_process(pid, signal.SIGTERM, run_as_root=True, root_helper=conf.AGENT.root_helper)
+            for device in ip.get_devices():
+                unplug_device(device)
+        ip.garbage_collect_namespace()
+    except Exception as e:
+        sys.stderr.write("Error - unable to destroy namespace: {} : {}\n".format(namespace, e))
+
 def net_list(neutron_get):
     hosts = dict()
     net_list = neutron_get.list_networks()
@@ -64,26 +79,26 @@ def del_bad_dhcp(dhcp_ns, dhcp_hosts, conf, dhcp_prefix, debug):
         cut_ns_name = ns[len(dhcp_prefix):]
         if cut_ns_name in dhcp_hosts:
             if hostname not in dhcp_hosts[cut_ns_name]:
-                destroy_namespace(conf, ns, conf.force)
+                ldestroy_namespace(conf, ns)
                 if debug:
-                    sys.stdout.write("DEBUG: {} host {} deleted {} because host wrong\n"
+                    sys.stderr.write("DEBUG: {} host {} deleted {} because host wrong\n"
                                      .format(sys.argv[0], hostname, ns))
             else:
                 if debug:
-                    sys.stdout.write("DEBUG: {} host {} {} looks ok\n"
+                    sys.stderr.write("DEBUG: {} host {} {} looks ok\n"
                                      .format(sys.argv[0], hostname, ns))
         else:
-            destroy_namespace(conf, ns, conf.force)
+            ldestroy_namespace(conf, ns)
             if debug:
-                sys.stdout.write("DEBUG: {} host {} deleted {} because no related network found\n"
+                sys.stderr.write("DEBUG: {} host {} deleted {} because no related network found\n"
                                  .format(sys.argv[0], hostname, ns))
 
 def del_bad_not_dhcp(not_dhcp_ns, conf, debug):
     for ns in not_dhcp_ns:
         if eligible_for_deletion(conf, ns, conf.force):
-            destroy_namespace(conf, ns, conf.force)
+            ldestroy_namespace(conf, ns)
             if debug:
-                sys.stdout.write("DEBUG: {} host {} deleted {} because no IP addr\n"
+                sys.stderr.write("DEBUG: {} host {} deleted {} because no IP addr\n"
                                  .format(sys.argv[0], hostname, ns))
 
 if __name__ == "__main__":
@@ -118,17 +133,17 @@ if __name__ == "__main__":
                     del_bad_dhcp(dhcp_ns, dhcp_hosts, conf, DHCP_NS_PREFIX, debug)
                 else:
                     if debug:
-                        sys.stdout.write("DEBUG: {} host {} no dhcp ns found\n"
+                        sys.stderr.write("DEBUG: {} host {} no dhcp ns found\n"
                                          .format(sys.argv[0], hostname))
                 if not_dhcp_ns:
                     del_bad_not_dhcp(not_dhcp_ns, conf, debug)
                 else:
                     if debug:
-                        sys.stdout.write("DEBUG: {} host {} no not_dhcp ns found\n"
+                        sys.stderr.write("DEBUG: {} host {} no not_dhcp ns found\n"
                                          .format(sys.argv[0], hostname))
             else:
                 if debug:
-                    sys.stdout.write("DEBUG: {} host {} no ns found at all\n"
+                    sys.stderr.write("DEBUG: {} host {} no ns found at all\n"
                                      .format(sys.argv[0], hostname))
         except Exception as ex:
             sys.stderr.write(
@@ -139,6 +154,4 @@ if __name__ == "__main__":
             sys.stderr.write(
                 "Cleaning network namespaces caught an exception")
             time.sleep(30)
-        finally:
-            cfg.CONF.clear()
-        time.sleep(timeout)
+        time.sleep(timeout)
\ No newline at end of file
diff --git a/releasenotes/notes/neutron.yaml b/releasenotes/notes/neutron.yaml
index d373776103..452dd4f829 100644
--- a/releasenotes/notes/neutron.yaml
+++ b/releasenotes/notes/neutron.yaml
@@ -34,4 +34,5 @@ neutron:
   - 0.2.18 Updated naming for subchart compatibility
   - 0.2.19 Added qdhcp NS host validation for deleting wrong namespaces.
   - 0.2.20 Add Xena and Yoga values overrides
+  - 0.2.21 Fix for qdhcp NS host validation for deleting wrong namespaces.
 ...