20738 update vc_position in delete not signal handler

netbox/dcim/models/devices.py

@@ -1154,7 +1154,6 @@ class VirtualChassis(PrimaryModel):
             })
 
     def delete(self, *args, **kwargs):
-
         # Check for LAG interfaces split across member chassis
         interfaces = Interface.objects.filter(
             device__in=self.members.all(),
@@ -1168,6 +1167,13 @@ class VirtualChassis(PrimaryModel):
                 "interfaces."
             ).format(self=self, interfaces=InterfaceSpeedChoices))
 
+        # Clear vc_position and vc_priority on member devices BEFORE calling super().delete()
+        # This must be done here because on_delete=SET_NULL executes before pre_delete signal
+        for device in members_list:
+            device.vc_position = None
+            device.vc_priority = None
+            device.save()
+
         return super().delete(*args, **kwargs)