It seems that 996df30a06ab3c8e75c36f4ee8b24e2118ed9686 introduced this issue, as `_registerConnection` return was changed:
```
- return connection
+ return (connection, created)
```
Aug 30 08:54:39 maas maas-regiond[1350]: maasserver.ipc: [critical] Failed to update regiond's processes and endpoints; maas:pid=1350 record's may be out of date
Aug 30 08:54:39 maas maas-regiond[1350]: Traceback (most recent call last):
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/internet/asyncioreactor.py", line 271, in _onTimer
Aug 30 08:54:39 maas maas-regiond[1350]: self.runUntilCurrent()
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/internet/base.py", line 991, in runUntilCurrent
Aug 30 08:54:39 maas maas-regiond[1350]: call.func(*call.args, **call.kw)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 700, in errback
Aug 30 08:54:39 maas maas-regiond[1350]: self._startRunCallbacks(fail)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 763, in _startRunCallbacks
Aug 30 08:54:39 maas maas-regiond[1350]: self._runCallbacks()
Aug 30 08:54:39 maas maas-regiond[1350]: --- <exception caught here> ---
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 857, in _runCallbacks
Aug 30 08:54:39 maas maas-regiond[1350]: current.result = callback( # type: ignore[misc]
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/lib/python3.10/site-packages/maasserver/ipc.py", line 622, in ignore_cancel
Aug 30 08:54:39 maas maas-regiond[1350]: failure.trap(CancelledError)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/python/failure.py", line 451, in trap
Aug 30 08:54:39 maas maas-regiond[1350]: self.raiseException()
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/python/failure.py", line 475, in raiseException
Aug 30 08:54:39 maas maas-regiond[1350]: raise self.value.with_traceback(self.tb)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 244, in inContext
Aug 30 08:54:39 maas maas-regiond[1350]: result = inContext.theWork() # type: ignore[attr-defined]
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 260, in <lambda>
Aug 30 08:54:39 maas maas-regiond[1350]: inContext.theWork = lambda: context.call( # type: ignore[attr-defined]
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/python/context.py", line 117, in callWithContext
Aug 30 08:54:39 maas maas-regiond[1350]: return self.currentContext().callWithContext(ctx, func, *args, **kw)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/python/context.py", line 82, in callWithContext
Aug 30 08:54:39 maas maas-regiond[1350]: return func(*args, **kw)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/lib/python3.10/site-packages/provisioningserver/utils/twisted.py", line 856, in callInContext
Aug 30 08:54:39 maas maas-regiond[1350]: return func(*args, **kwargs)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/lib/python3.10/site-packages/provisioningserver/utils/twisted.py", line 203, in wrapper
Aug 30 08:54:39 maas maas-regiond[1350]: result = func(*args, **kwargs)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/lib/python3.10/site-packages/maasserver/utils/orm.py", line 771, in call_within_transaction
Aug 30 08:54:39 maas maas-regiond[1350]: return func_outside_txn(*args, **kwargs)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/lib/python3.10/site-packages/maasserver/utils/orm.py", line 574, in retrier
Aug 30 08:54:39 maas maas-regiond[1350]: return func(*args, **kwargs)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/usr/lib/python3.10/contextlib.py", line 79, in inner
Aug 30 08:54:39 maas maas-regiond[1350]: return func(*args, **kwds)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/lib/python3.10/site-packages/maasserver/ipc.py", line 590, in _update
Aug 30 08:54:39 maas maas-regiond[1350]: self._updateConnections(process, conn["rpc"]["connections"].copy())
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/lib/python3.10/site-packages/provisioningserver/utils/twisted.py", line 203, in wrapper
Aug 30 08:54:39 maas maas-regiond[1350]: result = func(*args, **kwargs)
Aug 30 08:54:39 maas maas-regiond[1350]: File "/snap/maas/x1/lib/python3.10/site-packages/maasserver/ipc.py", line 521, in _updateConnections
Aug 30 08:54:39 maas maas-regiond[1350]: previous_connection_ids.discard(db_conn.id)
Aug 30 08:54:39 maas maas-regiond[1350]: builtins.AttributeError: 'tuple' object has no attribute 'id'
