diff --git a/mktxp/collector/dhcp_collector.py b/mktxp/collector/dhcp_collector.py
index f7d48e1..9be4e37 100644
--- a/mktxp/collector/dhcp_collector.py
+++ b/mktxp/collector/dhcp_collector.py
@@ -25,7 +25,7 @@ class DHCPCollector(BaseCollector):
         if not router_entry.config_entry.dhcp:
             return
 
-        dhcp_lease_labels = ['active_address', 'address', 'mac_address', 'host_name', 'comment', 'server', 'expires_after', 'last_seen', 'client_id', 'active_mac_address']
+        dhcp_lease_labels = ['active_address', 'address', 'mac_address', 'host_name', 'comment', 'server', 'expires_after', 'client_id', 'active_mac_address']
         dhcp_lease_records = DHCPMetricsDataSource.metric_records(router_entry, metric_labels = dhcp_lease_labels)
         if dhcp_lease_records:
             # calculate number of leases per DHCP server
diff --git a/mktxp/datasource/dhcp_ds.py b/mktxp/datasource/dhcp_ds.py
index 5473dd5..bf5887e 100644
--- a/mktxp/datasource/dhcp_ds.py
+++ b/mktxp/datasource/dhcp_ds.py
@@ -22,7 +22,7 @@ class DHCPMetricsDataSource:
     @staticmethod
     def metric_records(router_entry, *, metric_labels = None, add_router_id = True, dhcp_cache = True, translate = True, bound = False):
         if metric_labels is None or dhcp_cache:
-            metric_labels = ['host_name', 'comment', 'active_address', 'address', 'mac_address', 'server', 'expires_after', 'last_seen', 'client_id', 'active_mac_address']
+            metric_labels = ['host_name', 'comment', 'active_address', 'address', 'mac_address', 'server', 'expires_after', 'client_id', 'active_mac_address']
 
         if dhcp_cache and router_entry.dhcp_records:
             return router_entry.dhcp_records