tail -f /var/snap/maas/common/log/regiond.log
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/websockets/base.py", line 553, in list
	    return [self.full_dehydrate(obj, for_list=True) for obj in objs]
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/websockets/base.py", line 553, in <listcomp>
	    return [self.full_dehydrate(obj, for_list=True) for obj in objs]
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/websockets/base.py", line 233, in full_dehydrate
	    return self.dehydrate(obj, data, for_list=for_list)
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/websockets/handlers/controller.py", line 180, in dehydrate
	    vlan_counts[self._vlans_ha[vlan_id]] += 1
	builtins.KeyError: None

2022-08-04 14:55:09 maasserver.websockets.protocol: [critical] Error on request (1) controller.list: None
	Traceback (most recent call last):
	  File "/usr/lib/python3.8/threading.py", line 870, in run
	    self._target(*self._args, **self._kwargs)
	  File "/snap/maas/23093/lib/python3.8/site-packages/provisioningserver/utils/twisted.py", line 821, in worker
	    return target()
	  File "/snap/maas/23093/usr/lib/python3/dist-packages/twisted/_threads/_threadworker.py", line 46, in work
	    task()
	  File "/snap/maas/23093/usr/lib/python3/dist-packages/twisted/_threads/_team.py", line 190, in doWork
	    task()
	--- <exception caught here> ---
	  File "/snap/maas/23093/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 250, in inContext
	    result = inContext.theWork()
	  File "/snap/maas/23093/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 266, in <lambda>
	    inContext.theWork = lambda: context.call(ctx, func, *args, **kw)
	  File "/snap/maas/23093/usr/lib/python3/dist-packages/twisted/python/context.py", line 122, in callWithContext
	    return self.currentContext().callWithContext(ctx, func, *args, **kw)
	  File "/snap/maas/23093/usr/lib/python3/dist-packages/twisted/python/context.py", line 85, in callWithContext
	    return func(*args,**kw)
	  File "/snap/maas/23093/lib/python3.8/site-packages/provisioningserver/utils/twisted.py", line 856, in callInContext
	    return func(*args, **kwargs)
	  File "/snap/maas/23093/lib/python3.8/site-packages/provisioningserver/utils/twisted.py", line 202, in wrapper
	    result = func(*args, **kwargs)
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/utils/orm.py", line 756, in call_within_transaction
	    return func_outside_txn(*args, **kwargs)
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/utils/orm.py", line 559, in retrier
	    return func(*args, **kwargs)
	  File "/usr/lib/python3.8/contextlib.py", line 75, in inner
	    return func(*args, **kwds)
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/websockets/base.py", line 418, in prep_user_execute
	    return self._call_method_track_queries(
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/websockets/base.py", line 442, in _call_method_track_queries
	    result = method(params)
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/websockets/base.py", line 553, in list
	    return [self.full_dehydrate(obj, for_list=True) for obj in objs]
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/websockets/base.py", line 553, in <listcomp>
	    return [self.full_dehydrate(obj, for_list=True) for obj in objs]
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/websockets/base.py", line 233, in full_dehydrate
	    return self.dehydrate(obj, data, for_list=for_list)
	  File "/snap/maas/23093/lib/python3.8/site-packages/maasserver/websockets/handlers/controller.py", line 180, in dehydrate
	    vlan_counts[self._vlans_ha[vlan_id]] += 1
	builtins.KeyError: None