Bug report: Application crashed with KeyError

## Automated report

_This issue was created with the app's automated bug reporting feature.
Attached to this issue is the full traceback as well as an environment
fingerprint that contains information about the operating system as well as all
installed libraries._

## Additional comments (optional):

_Example: I submitted a band structure calculation for Silica._

## Attachments

Traceback

```python-traceback
/opt/conda/lib/python3.11/site-packages/aiida/storage/psql_dos/migrator.py in get_schema_version_profile(self, check_legacy)
114 Note, the version will be None if the database is empty or is a legacy django database.
115 """
--> 116 with self._migration_context() as context:
117 version = context.get_current_revision()
118 if version is None and check_legacy:

/opt/conda/lib/python3.11/contextlib.py in __exit__(self, typ, value, traceback)
142 if typ is None:
143 try:
--> 144 next(self.gen)
145 except StopIteration:
146 return False

/opt/conda/lib/python3.11/site-packages/aiida/storage/psql_dos/migrator.py in _migration_context(self)
443 with self._alembic_connect() as config:
444 script = ScriptDirectory.from_config(config)
--> 445 with EnvironmentContext(config, script) as context:
446 context.configure(context.config.attributes['connection'])
447 yield context.get_context()

/opt/conda/lib/python3.11/site-packages/alembic/runtime/environment.py in __exit__(self, *arg, **kw)
214
215 def __exit__(self, *arg: Any, **kw: Any) -> None:
--> 216 self._remove_proxy()
217
218 def is_offline_mode(self) -> bool:

/opt/conda/lib/python3.11/site-packages/alembic/util/langhelpers.py in _remove_proxy(self)
68 globals_["_proxy"] = None
69 for attr_name in attr_names:
---> 70 del globals_[attr_name]
71
72 @classmethod

KeyError: 'config'
```

Environment fingerprint

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**By submitting this issue I confirm that I am aware that this information can
potentially be used to determine what kind of calculation was performed at the
time of error.**